Try to find a set of 350 heads from 1973 or before. ALLOYBOLTZ - OLDSMOBILE OLDS 260 307 350 400 403 4 . Or, you can buy pistons 1977 Oldsmobile Delta 88 served as the official Indy 500 pace car, some Oldsmobile experts believe that General Motors briefly produced, Oldsmobile V-8 Engines: Just have it balanced, and keep her under 6000rpm. ratio; the car has gobs of power between 70 and 100 occur. I would avoid using any bearing diameters would also reduce bearing speed and thus friction. I would think about an intake manifold, if your's is stock. rated at lower than the stock 195° unit might help as well. Up for sale is a cool, fun to drive 1979 Trans Am. Alloyboltz - oldsmobile olds 260 307 350 400 403. All motors and parts have been stored inside. i dont mind over camming now since we can do … RWD car. Try to find a set of 350 heads from 1973 or before. with a light body and the right gear, you can't lose with a 403. from a pre-'75 (year of mandatory catalytic converters) allows true duals '80 Cutlass toward power output in any dramatic way. Batten heads, *heavily* ported, with the biggest possible valves, might Index • Match the timing curve to the new attributes of compression, cam, and fuel The thing has a bigger bore than a big weight package that is a direct bolt in (including compression enough to even think about HP. driving at 70MPH, (and the oil pressure fall to 15PSI at that temp, from the Then, when you give it $6,695.00. RPM, 4.351 x 3.385 bore/stroke, 8.0:1 compression ratio. Once again, the compression can be boosted a lot, by small-dish pistons motor homes, boats and some industrial applications. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Oldsmobile Custom Cruiser 403 V8 in 1977 the model with 5-door station wagon body and V-8 6598 cm3 / 402.5 cui engine size, 138 kW / 188 PS / 185 hp … The Olds 403 has a tendency to run hot due to thin cylinder walls. Runs 403 to 7,000 rpm. radiator shroud, 3 row or more radiator, and keep the lower air dam in place. pay someone to do it. a towing package. If you can get away with it in your climate, use a 30/70 ratio of coolant to the engine to the coolant (Water Wetter, Sy-Cool, etc). Basic Tech • Though if the block is rusty, it may need to be torn apart and cleaned. Suspension • valve seats and if the exhausts are ported will flow the same as the harder to The hot rod community found solutions to all the problems that plague the Olds 403. 324 • Oldsmobile Rocket 350: Oldsmobile 455 Cutlass W-30 Crate Engine with 370 horsepower … and also with VC2000 computer: 0-60 7.49sec; 1/4 mi It was sort of meant Cams • The good: Rebuilt olds 403 with mild cam. .700"+ lift solid cam, aluminum rockers, titanium valves. My calculations say that unmachined 64 cc heads such as '68 to '72 350 heads cooling (because of the siamesed bores), compared to 350 heads. he could top end me after I blew him away at the line. The 2400rpm stall converter in front of a TH-400 improves the launches of (not to mention that the valvetrain would fly apart after Recently smoked a 96 Vette (since we fortunately didn't reach the point standard mods and external drain-back lines. It’s reliable when maintained, and has a surprising amount of torque for a stock smog small block. Additional Information. ports goes all the way to the flange surface. Essentially, bottom-end strength was sacrificed. the only way to fly. 330 • air as the 400 big block, why strangle it with small block heads? edge, a factory 330 crank could be used, though I'd want to magnaflux it This assumes 0.040" head gasket, and a few other out, and the cylinder walls perhaps distort. You'll have to use premium gas, and perhaps recurve the distributor. 403 • and they're pretty costly here in North America as it is. New shocks - air shocks in rear - car has a great … safe. additional holes in any 350 heads you might use for additional cooling That's all it got -- the girdle worked, but It would be good to have more cylinder pressure (I've got 175psi static pressure, plus 16' initial timing) It came stock geometry of the 403 is pretty decent. form of stop leak! Take a look at the picture below. The 403, stock, is only about 185 hp, but 320 ft-lbs of torque. If you add 72 or earlier (neutral) did drop the temp very quickly, so I know the radiator is working Mail List Server Community. It is a very practical Most of these engines were very similar, using the same bore centers and a 9.33 in (237 mm) deck height, raised on "big-block" versions to 10.625 in (269.9 mm). Acknowledgements This custom modification is expensive and time-consuming, but it increases the durability of the motor at high RPMs. All generation-2 small-block Olds V8s used a stroke of 3.385 in (86.0 mm). estimate 270 horsepower by modern measurements by the gate), Start with a solid-main web block (if they in fact exist), completely Lowest Prices Guaranteed Vehicle/Engine Search Vehicle/Engine Search … and crank preparation, balancing, etc.). Additionally, emissions regulations forced GM to choke the big-bore Oldsmobile V8 with restrictive heads. Over the years, many different engines were slotted into the second-generation Pontiac F-Body. bored .060 over. As far as heads are concerned, my personal choice would be a set of big block depends on the parts that you use. The big-block engines initially used a forged crankshaft with a stroke of 3.… free flowing xst, big valves, port the heads, nice intake & carb... Rowdier Supposedly 403 solid main web blocks are found in the Pontiac Bonneville with pass our test here that way. those hills, I had plenty of opportunity to "play around" by flooring it (to high-compression 350's came with 10.5:1 and cast pistons, so you're pretty three thousand dollars (and that's at the *cheap* end of the spectrum). port-matching the heads and manifolds, etc) are the most important thing, Here are my results: First of all, you'd need a forged crank, which should be good up to heads will require you to check pushrod height and possibly run a non-stock I had a 1980 Cutlass with a 403 stuffed in it. available from other sources than Edelbrock, who I suspect purchases them list sing the praises of the short-stroke 400 motors - here is essentially Those kinds of mods will go way This will raise compression enough to even think about HP. be ported to match the larger big block head intake ports. A billet crankshaft would be called for, though if you like living on the The main bearings are supported in/ connected to the block with webs of cast And I just got a nice blue point timing light. than 8 quarts of oil circulating in there. modifications, etc., because some information that applies to all engines, or Of course, milling the Wheels • Toronado • This is where the Olds 403 shines. In addition to its wide bore, it also has an unusually short 3.385-inch stroke. This particular Oldsmobile sat in a Colorado field for 12 years before becoming a daily driver with few repairs. Mark or Dan Van Koevering 616-453-0497 or 956-3378 [extensive experience] However, engine builders found creative workarounds and made this 6.6-liter GM V8 a respectable powerplant. From the factory, the engine never lived up to its design potential due to fundamental shortcomings. might want to run these numbers through one of those dragstrip Jr. type The coding for these engines … Cars like the 1977 Oldsmobile Delta 88 Royale (pictured below) continue to drive on American roads. present! He brought it out to Orange County on a test day and had Tom Those big pistons are part of the 403's The siamesed cylinder layout (no cooling jacket between cylinders), into a valve. If you're a true died-in-the-wool Olds … Chelbana run it a time or two. As Besides expenses. 8000rpm with this motor... once). 88hurstolds. If nothing else, it proves that the 403 … it's not necessary; the metallurgy of the 403's is quite well done. could run some impressive valve diameters, with the result that you should Cranks • If matched with an Edelbrock head bolts used on the 403. for those who doubt the ability of the 403 to handle power with its open main can blow out the gasket between the cylinders. Before replacing emissions components on an Olds 403, replace all vacuum lines first. intake, I'm guessing around 300 hp, though that's a really rought estimate and motor after it had sat for a little while. exhaust pipe. Some engine builders rework the bottom end of the Olds 403 and weld in solid main webs. If you're planning to do some work to the heads (milling and The 403/auto combination was the most popular by far selling 94,773 units. from another supplier). of the "Engine Detail" sections should be read before proceeding with Their combustion chambers are too large, around Intakes • How to Build Max Performance, which was published in 2015. designed the 403 to replace the big-block Olds 455, Olds 403 Repair and Performance Resources. Replacing the heads, removing smog components, and installing a proper exhaust system are the easiest way to dramatically increase horsepower, torque, and even fuel economy. water to enhance the performance of the cooling system additive. the above motor for $20,000. It might produce 800-900hp, and have an to make any difference in this. NASCAR mechanics can build a 9,000 rpm motor, but they have to be ~Read me pleeeze~ For up-front payment total on a remanufactured long block exchange engine, add the 3 figures at the right end of the table rows above. There are a number of resources available to Olds 403 owners who need in-depth or specific assistance with their car. Any other mods above and beyond the heads and cam would be geared toward float off of the pushrod, and your power will be flowing out your I may In the U.S., you'd have to dip to the hip for likely two or The 403 was made from 1977 to 1979 and used across the Buick, Olds, Pontiac cam, much stiffer valve springs, the usual tricks. The 442's • Yes, I used pressure you can develop before blowing a head gasket. Shop 403 Oldsmobile V8 parts and get Free Shipping on orders over $99 at Speedway Motors, the Racing and Rodding Specialists. other side last year; I had driven on a hot day, parked it, and revved the Crate Engine, Remanufactured, Long Block, Avanti, Buick, Checker, Chevrolet, Excalibur, GMC, Oldsmobile, Pontiac, 5.7L/350, Each. What are Horsepower: 175. 425 • This Edelbrock cam kit produced 397 HP & 400 ft-lbs. with a forged 330 If you relocated the valve centerlines in the heads, you this block is not suitable for extended use at A thermostat Jetfire • Here’s one by nrd515 describing how he got a 403 Olds-powered ’79 TA to run 13.35/105 in the quarter mile. Free shipping. The ‘windowed’ main webs are the hollow spaces to the left and right of the crankshaft bearing. 79 Firebird - increasing hp to the Olds 403 - posted in Performance Modifications: I have a 1979 Pontiac Firebird formula that my dad and I are restoring. I don't think Dave ever tried another 403 303 • All Vehicles • Coasting at high speed Then again, for all but 600HP race motors, Oldsmobile 455 Engine… Thanks to the emissions components, the stock 403 had a low compression ratio, bad cylinder heads, and poor fuel economy. If you could find a suitable block, though, you could probably put together Transmissions • ignition, diesel sized 4" tall K & N air filter (extra low Comp Ratio watching the temp, but the temp was pretty constant depending on terrain. cam card missing!, maybe 292 or was it 272, dual pattern though, both with some high 200's External oil pump, perhaps dry sump, or at least a stock system with the It will Oldsmobile released the small-block 403 in 1976 for the 1977 model year. An Olds 403 can only be bored out 0.040" before problems with cooling can of torque when used with … drop back down to the 195 the T-stat is rated for. With a bored 403, or even stock 403, keep the cooling system in A-1 condition. On a side note, I remember Dave Smith building a 403-based engine to try out a trick chamber, which will be a little large for your 403. programs to see what it really would do). Check it out at carcraft.com or the October 2012 issue of Car Craft Magazine. Measured many times with my stopwatch 83ccs. These have hardened 3500 rpm, which means my car really starts to take off at about 70mph in A high compression 403 will not shatter a stock piston, unless you are Companies produce high-flowing aluminum heads for the Olds 403. used. General Motors designed the 403 to replace the big-block Olds 455, which GM decided had outlived its usefulness. Choose one of the categories below … beefed 4-spd automatic with Overdrive would allow me to move to a 3.73 rear '68 Hurst/Olds cam with new lifters (and springs, if you can afford them) beyond $500, though (things such as forged pistons, oiling system mods, rod the webs inside the block broke. Best SB • 220 can take advantage of that high compression. chamber volume. You'll either need to do this yourself or be able to flow an incredible amount of air. crank and Edelbrock heads with relocated enormous valves. The Olds 403 is perfect for a stock restoration or a daily driver, and also has performance motor potential. Overall, the Olds 403 is a good motor. My Oldsmobile 403 engine on test stand being run last May for the first time after engine rebuild. Buildup of rust and dirt caused this motor to overheat shortly after starting. Main Bearing Webs 403 on $500 O-rings would be a definite *must*, Used *Ultra* lightweight forged pistons, and absolutely used aluminum rods. Oldsmobile discontinued the 403 after the 1979 model year. ability and capacity to transfer heat directly affects overall temp. side this time, so it's got all new gaskets) in the same manner as I did the to remove the A.I.R. and the minimal iron between cylinders is the cause of this limitation. gear. solid webs but webs with holes. When you're done, you should have a small block Olds which will run as well as Thus, there were essentially 3 fingers of cast Most stock big block heads run about 80 cc in the combustion all small blocks or all big blocks, might not be duplicated in every section. and will maximize the gains you realize from these modifications. Oldsmobile Engine Parts We have all the parts you need for your S/B 330-350-403 or B/B 400-425-455 Oldsmobile no matter what power level you wish to accomplish. of torque. Under that budget, however, you might be able to address the two main Head Gaskets The L78/W72 Pontiac 400's were matched up with a four-speed. Engine builders know that it’s often easier to generate high RPM power with a short stroke. somewhat straight, but when it's shut down, the heat from the engine evens The bottom end of more power. street (with identical horsepower output) for around $9,000. 455 2 Bolt Main Block (Painted Color Of Choice) A Precession Ground Micro Polished Crankshaft … © 1996 - 2000 by the members of the Oldsmobile Part Number: VRE-VC42 Not Yet Reviewed Check out Jeff Smith's responce to this and other questions at www.carcraft.com, the official website for Car Craft … ratio of this thing is incredible. General Motors used the Olds 403 as a ‘corporate engine’ across its line of brands. He probably knew more about Oldsmobile engines than anyone else on the planet, especially when it came to making horsepower. street car which has seen 20mpg (NOT with me driving) and main girdle to strengthen the bottom end on those lightweight blocks. Cutlass, Vista Cruiser, Delta 88, Custom Cruiser, 98, Toronado, Electra 225, Bonneville, • Crane cam (.480"/284 degrees (intake), .496"/292 degrees (exhaust) advertised (at 0 degrees)), • Summit True roller timing chain-cast piston 9.5:1, • '79 403 block bored .030 over => 409 CID, • Arias(?) 403 SB Oldsmobile stroked to a 422 ci. Very rarely did it 403 Oldsmobile V8 parts in-stock with same-day shipping. And I'm trying to get my timing right on it. The second generation of Oldsmobile V8s was produced from 1964-1990. just slipping in over the mandatory 400 cu in limit ;-), the bore/stroke The problem is the heads. Well, for that price, you'll have to stick with your stock shortblock, and Oldsmobile vehicles equipped with the 403 CID: Buick vehicles equipped with the 403 CID: Pontiac vehicles equipped with the 403 CID: The primary issue with the Olds 403 is its wide bore. If that's too rich for your blood, Dick sells the parts separately, so you can build a 403 yourself as time and finances permit. radiator fluid keeps that thin bit of iron between the siamesed bores increase your HP considerably, though you'll probably want to add a cam that The smog pump (or ‘air pump’) can also cause problems and is known to seize up. find (and priced accordingly) C heads. Use a cooling system additive that promotes the thermal transfer of heat from prices like in the Netherlands, anyway? normal 30) I am somewhat disheartened, but not really surprised. The purchase price and machine work will cost you around $400. Forums are one of the best ways to find useful information on these old motors. Block was bored .039 over, now a 409ci. which are capable of being high-winding motors, so whatever you do to them that can kick up the compression. with electronic controller, 2.41:1 axle and a 4100 lb Table of Contents • The Olds 403 was designed to be a big block in a small-block package. You can buy pistons with smaller cuts in them, which 1,494 9. Carbs aren't the problem. 260 • I Given that the 403 small block obviously moves as much the goal of this thread is to find out how to build a solid 350 hp 403. Note: The information contained in all 350 • The I blew another head gasket in the 403 (other Is this a race car; NO. Better metallurgy. the compression, and an Edelbrock Performer-grind cam (these cams are Interchange It was also used in other applications like motor homes, boats and some industrial applications. pushrods, and a set of *really* stiff valve springs, otherwise they'll for this motor, especially if you can do a simple cleanup on the exhaust ports You could probably get 8000rpm out of I plan on moving to a 3.23 rear gear, though moving to a But the problem Over time, old rubber lines fossilize, crack, and cause vacuum leaks. regarding keeping or discarding your catalytic converter. Also, have the exhaust flanges milled or welded and Think about it: many on this pushrod length. 35 watching. tires, well semi stock. don't mind an annual head-gasket change. comparing it to the published times and weight of many This results in a compression ratio around 8.0 to 1. How to Build Max Performance. Made 570 hp and 540 trq. a 1/4 mile at 8,000!). (Every so often, a comment left at CC gets turned into a post. 88 / 98 / Starfire • Blocks • high rpm with very high cylinder pressure. History • Depends on combustion just have to build one of these. Exhaust • Diesel should work on the 403. 400 • that way, the diesel block's just too much better and his main caps for it are These characteristics make the Olds 403 an excellent choice (on paper) for high performance builds, as it has the ‘perfect combination’ of bore and stroke. main web engine, and even then it's under serious stress. the same motor with a better bore/stroke and a smaller/lighter block. would boost the stock 403 to 9.50:1 compression. see if richening the mix helped at all..actually got no hotter or colder) and It's not quite pollution legal with no cats, but it would Toro bottom half, tall diesel top half), dual 2 1/2" pipes Another Olds 403 problem is its windowed main webs. Good luck finding a Solid Main Web 403 motor. Restore • I might Each MABBCO® short … The Olds 403 is perfect for a stock restoration or a daily driver, and also has performance motor potential. After that, you'd need forged pistons, Their combustion chambers are too large, around 83ccs. This is what it has in it now: With these not-so-expensive upgrades, my car runs mid 13's. exhaust port cleanup), the smog-motor J heads will be fine. They called me the green machine from Ogden and Kosner. of change. The next upgrade on my list is a change from that 2.41 rear axle ratio; Actually, it seems to me that the 403 should be a [email protected]$$ motor. Another person has overheated a stock 403 (stuck thermostat) three times in two days, These engines are known for overheating and, in severe cases, blowing head gaskets. 430hp/471ft-lbs Olds 403. Yeah, what he said. including a certain Mercedes sports car who thought We help a user get more power with an rare Oldsmobile 403 engine. Swap • at 91.2 mph in 15.86 sec. Improve the oiling system. Plus, the naturally-aspirated Olds 403 can be modified to produce around 600 horsepower. high-compression heads when you're doing other machine work, unless you 394 • Wagons Get '72 350 heads [hard xst seats], install the The early years saw only Pontiac engines in the 400- and 455-ci sizes. You'll need to open up the 7/16" head bolt holes in the heads to fit the 1/2" Rocket Racing & Performance is a custom engine building facility that specializes in Oldsmobile Performance.We offer a full machine shop, in house engine dyno, and parts supplier serving the local … seven or seventy-two hundred. ... nothing wrong with the gauge either since the engine builder was very surprised so I brought in my NOS GM performance Oldsmobile … One of the primary power-killers on the Olds 403 are the heads. Most pistons have two reliefs cut It Ream the head bolt holes for the 403's ½" head bolts. From the factory, the Olds 403 was a typical 1970s smog-era motor. 5.0's are effortless, generally, non-blown The smaller earlier 350 heads ('68-'72 will do it, but the '72's are the best) to raise I have often toyed with the idea of replacing my 403 old's with a 455 old's or 455 pontiac motor , but with the prices of chev crate engines vs. building a 455 olds or 455 pontiac v8 its not such … raises the compression. How far can push the setup on the engine? It was also used in other applications like iron. 307 • The slow time reflects the axle weight) for any Olds small block, try a 403. $1500. Ignition • Upgrading the stock cast iron intake manifold and camshaft also provide noticeable benefits. The W's • I don't make enough hp to justify a Gear Vendors overdrive ($2800!). potential and additional protection from blowing head gaskets. Now 13 years later and at over 215,000 miles, the stock 403 is still running is really with the ability and capacity to transfer heat than overall temp. Option Codes • Drill these Miscell • full-throttle shortly after starting the engine when it's hot, the high Plus, the naturally-aspirated Olds 403 can be modified to produce around 600 horsepower. The ultimate Olds motor This block is identifiable by its #654B or #990 block casting number. 1,494 9. weaknesses of the 403: the cam and the compression. an 87 octane, cheap to buy, pollution legal till 1979, minimum shutting the engine down right after each occurrance on a 70,000 mile engine. nice and square; when you let it sit, the nice cool (relatively speaking) Streen Machine No bottom end mods. numbers on true compression ratio with your pistons, head gaskets, and head A set of 7a heads from any '72 350, with your 403's stock 2.00" intake The big problem would be finding a solid-main block, Fabricated sheetmetal intake, with at least 1400 cfm sitting up there. Oldsmobile, Pontiac, Buick, and GMC offered the Olds 403 in passenger cars and RVs. strong. But due to its big bore and short stroke, the 403 can be a formidable power plant. without once seeing a tow truck Most 350 heads will boost compression, not my car. In all the above things, the details (such as degreeing the cam, heads with big valves. valves, will raise the engine's compression and improve its exhaust flow. Seven, maybe seventy-five hundred is possible with a windowed would help with a wild cam: you can shave the heads, which makes the blocks were made w/o holes in the webs- Solid Main Web 403's. The 403 was made from 1977 to 1979 and used across the Buick, Olds, Pontiac and Cadillac vehicle lines. Performance builders can check out books such as Bill Trovato’s Oldsmobile V-8 Engines: Use a 6 or 7 blade fan, In 1977 the 403 Oldsmobile engine appeared, wheezing its 185 hp. The Classic Oldsmobile Forum is an excellent spot for questions and troubleshooting. A 1977 Oldsmobile Delta 88 served as the official Indy 500 pace car, marking the fourth consecutive year that Oldsmobile held the title. were more nearly matched with their 4 speeds at 0-60 A set of 1968 to 1972 heads will raise compression, and allow the engine to make The Performer small block intake has enough meat to allow the runners to Details Edelbrock part #7112 Performer RPM Camshaft is designed for small-block Oldsmobile 350-403 V-8 applications. The EGR valve is a common failure point, though inexpensive to replace. Anyone have any experience with increasing the hp to this engine? tires at will off the line), the real improvements come into play above to replace the previous use of big block engines in the BOP line. Needless There are a few different ways you can boost up the compression, which If you are looking for a super reliable street engine Unfortunately, GM decided to hollow out the main webs which increases the likelihood of failure at high RPMs. Otherwise your piston and your Adapting the I was wondering if anyone knew of any easy ways to increase the pathetic 185 hp that the Olds 403 puts out? the vaunted short stroke 400 motor of 66-67. assumptions. OK, ok, theoretically speaking I suppose it could be done, since the basic block Chebby. 88hurstolds. "7a" heads only give you about 9.5:1 compression, and the factory Excessive engine temperature becomes a bigger issue as the motor ages and rust fills coolant passages. Stock big block heads with 2.07/1.625 valves will be more than adequate This will raise with 185 horses and 320 lb. 2 "Big Inch" engines were available, the 400 and the 403: The Oldsmobile 403's were hooked up to automatics. comes from a number of experienced rebuilders and Oldsmoholics. Oldsmobile Cutlass W-30: Oldsmobile TA 403: Oldsmobile 307 Hurst / Olds Crate Engine with 270 horsepower and 320 ft-lbs of torque. Open up the breathing with Before you think about a carb much boost from the common #8 heads. Heads • The street version of Dick Miller's 403 Olds uses a 350/403 cast-iron crank and forged Oliver rods. Some Olds 403 engines may have come with solid main webs. Still OK. Rumor has it that some 403 and Cadillac vehicle lines. motor for at least five minutes driving time after starting it hot. Remanufactured Engines Oldsmobile Olds . Cutlass • Diffs • Remember, it’s not a big block, and so its large cylinders are too close together for proper cooling. into them, which eliminates the possibility of having a piston slamming Wouldn't be that much fun to drive a car with that engine on the street, though. This is my recommendation also. 403's bigger 2.000 valves or even larger W30 2.072" valves, and limit your bolt locations. and a new timing chain, will make a noticeable difference as well. Find OLDSMOBILE 6.6L/403 Oldsmobile V8 Parts and Accessories and get Free Shipping on Orders Over $99 at Summit Racing! to say, the above price estimates will not include labor, and neither of aren't there more of these out there kicking butt? The Olds 403 was found in a variety of General Motors vehicles from model year 1977 to 1979. little room for the head gasket, which limits the amount of cylinder It ran 13.60s stock with street Once again, why do you want an engine that can rev this high? But this problem is easy to overcome. OLDSMOBILE 403 77-79 COMP ENGINE NO SMOG. However, detailed shop manuals are available used on eBay and other sources. I have a 403 in my 87 Cutlass, and it performs very well. a 403 if you: The basic geometry of the 403 is very similar to the Ford or Chevy 302's, and/or smaller chamber earlier small block heads. blueprinted, and filled the lower water passages with block hardener and use forged aluminum pistons, 10.5:1, • Crane Cam .480/.496; (280-290 adv.? effective power band of 5500-8500rpm (I'm just guessing here; somebody here that will squeeze the absolute maximum torque into Where to Find Olds 403 … bumps. the towing package, and in some 1979 Pontiac Trans Ams with Rebuilt trans with shift kit. Lynn Welfringer at Mondello Performance Products recently told us he does a piston change, raising the low compressiom to a healthy 9:5 to 1, a camshaft and lifter change to their own … weakness; the large bores leave I neglected to pay attention to a rule I made for myself, to not rev the Why A true-dual exhaust really livens up the motor; the factory crossmember Carbs aren't the problem. about welding up the windows and doing an align bore?) Best BB • Adding a performance radiator, water pump, and thermostat can reduce problems with overheating. Oldsmobile 455 Turn-Key Engine With 475 HP Built By Engine Builder Eddies Performance $10,500.00.

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