[コンプリート！] chevy 305 vs 350 identification 329085

  Small Block V8 305, 2bolt, Vortec truck, roller cam, 1piece rear seal Small Block V8 350, 4 bolt, crate engines and ZZ4, roller cam, one piece rear seal Chevrolet Block Identification number locations Question is (beyond what it takes to swap from 305 to 350) is it possible, and cost effective to rebuild a '79 350 to drop it in a '97 sierra or just buy a new 350 long block from gm that'll drop right in and be brand new Of course the pride associated with building your own engine goes a long way Link to post350 are basically the same engine The 305 just has a smaller bore(3736 vs 4000), not quite the power or torque, but durability should be almost identical

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Chevy 305 vs 350 identification

Chevy 305 vs 350 identification- While the Chevy 305 did not come with substantial power by today's standards, it is still a small block of Chevy V8 Given that it shares platforms with the hotrodder's engine of choice, the 350, there is a slew of aftermarket parts available "The Engine Block Casting code is one of the best ways to identify a Chevy engine block This Casting number is usually found at the rear of the block on the left or drivers side on top of the bellhousing flange "My 305 has a "50" cast into this location You can also search on the exact casting code that you find there if unsure

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Obviously other than casting number and the VIN (the engine was swapped) Just courious if there was a way, i'm pretty sure that they 305 and 350 use the same block just smaller bore and strokeor something like that 133 Posts #4 Huge difference With all the amazing deals going on, I say look for the Vortec 350 It is one of the best engines ever built If you really want the 305, you can get it, put some 350 heads on it with a higher lift camshaft beehive springs and rockers, larger fuel injectors and make it comparable TThe L31 heads from the latemodel 350 Vortec engine, introduced early in 1995, is the other type of cylinder head you need to look for on the used market This is probably the best cylinder head casting that Chevrolet has ever produced for a production small block Chevy

 By far the easiest way would be to pull a head and measure the bore A 350 will have a 4 inch bore ( as would a 327 or a 302) while a 305 will have a 3736 in bore The difference is very pronounced once you know what you are looking at Is there a way to tell the difference between a 305 50L and a 350 57L? The 305 smallblock debuted in 1976 in a variety of cars and trucks It featured the same crankshaft as the 350, but in a block with the same bore as the old 265

 Chevy Small Block Engine Block Casting Numbers Notes (for below) "High Power" is the maximum rate HP this block was used for, "Low Power" is the lowest rated horsepower RPO engine the block was used in "Main Caps" is the number of bolts holding the cap A "twobolt" main, or a fourbolt main Four bolt main blocks are desirable in high performance applications On trucks/vans/SUVs the 305 and 350 share the same 168 tooth ring gear and the offset bolt pattern starter Some midlate 90s use a small body starter though The stamp code on the heads will let you know what the heads are from You may find 350 heads on a 305 or 305 heads on a 350Dimensionally, the engines are identical, and most parts of the engines are interchangeable The engines use the same crankshaft and connecting rods, and have the same stroke, which is 3480 inches The single biggest difference is the bore size (3760 vs 4 inches)

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The 9092 350 TPI FBody engines (Camaro and Firebird) used the ECM, and so did the 9092 305 TPI engines The 1985 305 TPI engines used ECM, which is the same as the 1985 350 TPI ECM (350 was only available on the Corvette in 1985) The Corvette used the ECM on the 9091 350 TPI engines Since the '57 2 and the '66 Nova 2 are both probably a rare item to a "gold chainer" collector that demands "numbers matching" I would not use either one,the bucks you could probably get for them should buy you a nice built 350 or 3You just need to cruise the websites these people hang out on and post the adds listing the casting numbersIf you need to do a build Even with a smaller valve and slightly smaller runners, they are only marginally down (225 vs 215 cfm) @ 500" lift intake The 305 HO heads from the eighties flow cfm intake Exhaust is poor on all of them and should be ported, no matter what for an easy gain Sorry for bringing back an old thread

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 Did't want someone telling me it was a 350 and it's a 305, I don't really care but don't want to pay a 350 price for a 305 Years ago I had a '93 Caprice C91 retired police car and rebuilt that 350, the back of the block had '350' on it, think it was the drivers side rear What are the differences between Chevrolet small block 305 cubic inch and 350 cubic inch engines? The 305 shares the same stroke as 350, but has a much smaller bore Because of the small bore, the 305 has a few limiting factors The valves are shrouded by the small bores, some will also argue that you cant use 2s in it either , cause they hit the cylinders

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What the the difference between a 305 and a 350 Chevy engines What the the difference between a 305 and a 350 Chevy engines Now, for POTENTIAL performance, when you take a close look at the 307 vs 305, the 307 is the winner, hands down The 305 has a VERY small bore (like the original 5556 265s), whereas the 307 has the same bore as a 2 (3875) If you bore a 307 060 over and drop in a 350 crank, you get about 338 cubic inchesThe 305 also became the standard V8 in GM's C/K truck series, and was even used in the Corvette for California in 1980 Crankshafts used with the 305 had the same casting number as the 350 with one discernible difference the 305 crank is lighter in weight to compensate for engine balancing

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 This # eliminates the possibility of it being a 305, so it looks like you have a 1974 350 Probably the most common 350 casting # ever made and will be found machined either for 2bolt or 4bolt mains, you won't know which without pulling the oil pan to look wwwmorteccom for casting # codes Well I looked at the number again after I cleaned it off better with a wire wheel and sure enough it reads which is a 305 Now I'm just trying to figure out why somebody would go through the hassle of making this motor from a to a 8790 motor, because all the other ID numbers from the water pump, intake and, exhaust point to aThe Chevrolet 350cubicinch V8 is one of the most popular engines ever produced It's so common, that you can find derivations of the original design in even the newest GM vehicles But because of that popularity, there are dozens of variations of the motor out there, giving custom car builders lots of different

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 Its a good idea to use the crank in the 350 I've been told that the 305 crank is lighter, therefore you get your rpm's up faster,the boys on the dirt track swear by themCouldn't tell you about the rest though,but I wouldn't scrap all of it, ask your local engine machine shop about the rods to see if they can hold upalso you would want to use the harmonic balancer and 305 to 350 TBI swap , 0739 PM I helped a guy form church put a 350 he bought into his 1990 chevy truck The thing runs, but has a idle and part throttle stumbles I runs fine at WOT but I am guessing it is lean We used all of the parts off the 305 on the 350Go to the crank rack and pull down a crank out of a chev 267 cuinch Cast# 442 same as 350 Put that in your fresh 350 and call me in the morning with the results GM cast and marked all the 348 stroke cranks with 2 piece main seal all the same

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 And if the 350 heads have 2 valves, they will hit the 305's much smaller bore Some of the older 305's that used 434 casting heads which had 63cc chambersin that case a 64cc 194/150 350 head will work great with no compression loss (unfortunately no gain either) A good option is the L98 aluminum 350 vette heads with their 58cc chambers The 305 has a 1/4" longer stroke than the 327, so it just might have more lowend torque The streetstock 327's I worked on back in the 1960's and 70's were notorious gasguzzlers, although they made very good dirt track race engines after some pretty radical modifications A lowmileage 305 will probably make a better street engine for you Jerry Ok class if you really want to step on your foreskin!!!

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 Casting number is a Vortec head that is available from Chevrolet Performance It is completely assembled with 194/150inch valves, and 64 cc combustion chambers It can be machined for 2/160inch valves 1968 327ci, 64cc chambers, 194/150inch valves 1969 and 1970 302ci or 350ci, 64cc chambers, 194/150inchSBC Casting Number, 305 vs 350, Buyer BewareI remember when I bought this '78 El Camino up in New Jersey, in August 1991, the guy said his fatherinlaw put 305 vs 350 mileage, performance, reliability C/K Car Forums I am not sure of the driving habbit diferences or maybey the body styles but the most fuel efficient 350 i ever owned is sitting out on my lawn it gets an awesome 13 mpg ita a 98 2wd i have run a few 87 4x4s with 305s and never got worse than 19 in the city or highway my recent is a full rebuild its an 87 on a 79 1

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305 heads on a 350 You will find lots of hate on this one Putting 305 heads on a 350 was a good way to bump compression back in the day when compression was low, and aftermarket heads were almost "unattainable" Those days are long gone, and decent heads (be they aftermarket or Vortec) are cheaper than getting work done on old headsInformation you need from the engine code, example MMH 7=General Motor's model year in this case 1997, BUT this could also be 1987 or 1977 MH = Type of engine The 350 cid V8 Mercruiser models 57L, 350 Mag Mpi, Black Scorpion Ski, etc GM V8 305 cid (50L) – Sterndrive Models (LH rotation), flat liftersChevy Casting Number identification including Block casting numbers, cylinder head casting numbers, Crankshaft and intake casting numbers

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YEARS CASTING CID LOW POWER HIGH POWER MAIN CAPS COMMENTS 3502 car 4002 car, truck 1975 262 2 8 Posts #8 The 601 is a truck head it has really small chambers maybe too small because theyre tight around the valves it shrouds them pretty bad 416 is the so called HO head has the same 184 and 15 valves as 601 casting but larger chamber, actually same chamber they used on all early 305 headsInspired by the popular Chevy 350, the 305 had a more narrow bore and was placed in many widebodied GM model cars The Chevrolet Camaro, Caprice, Malibu, El Camino and Monte Carlo implemented the 305 along with the Pontiac Firebird and Grand Prix, Buick Skylark and Regal, the Oldsmobile Cutlass and Custom Cruiser, and the Cadillac Brougham

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Chevrolet 305 and 350 cubicinch engines are virtually identical, differing only in cylinder bore size To identify any Chevrolet smallblock V8 engine, the engine ID number must be matched to a listing of suffix codes, which identifies the details of the engine in question, including original application, horsepower, year of manufacture and technical specifications 305 and 350 are exactly the same except for piston size, what fits one fits the other (9 out of 10 times) Easiest way to differentiate is 305 is a 5 litre engine and the 350 is a 57 litre engine Should be stamped on the block Cheers By far the fastest and easiest way to ID your small block Chevy is to use the casting number found on the drivers side rear of the block on the top flange that mates with the tranny bell housingNumbers are raised approx 1/8 of an inchThe are about 3/4 of an inch tallEven though you may have to scrap greese and dirt away,the numbers may be seen plainly while the

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 Small Block Chevy Crankshafts All crankshafts have a casting number located on one of the rough finished throws or counterweights towards the front of the crank Two types of crankshafts are offered, cast nodular iron and forged steel Since forged cranks are more expensive to produce, they are generally used only in high performance or severe It is a Chevy 305 or 262 cubic inch You could tell by measuring the bore of the cylinder A 3671 bore is a 262 and a 3736 bore is a 305 They were made from 1975 to 1996 and they are all 2 bolt 1,706 Posts #6 nothing wrong with a 305, except that it doesn't have near the same power output as a 350, for the same size and power output If you don't need that much power, a 305 is fine For a cruiser, I would say go 350 though They are easy to find, just look around a little K

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 The main journals in a 305 are a different size, so the crank isn't bolt in, but it can be modified to fit The 327 has a 400 bore, same as a 350, you can't bore a 305 out that far As for putting a 350 in place of a 305, that's all there is to it Use the motor mounts that are on the 305Chevy Clutch Housings Most people define Chevrolet Bellhousings by the Clutch size (ie 105",11", or 12") Flywheel Diameter (1275" or 14") or number of teeth is more accurate because some 168 tooth flywheels are drilled with multiple bolt patterns, and the aftermarket makes a 153 tooth flywheel that a 11" clutch and pressure plate will fit 3,7 Posts #8 I have about 5 miles on my vortec head 350 crate motor, rated at 330 HP I can compare it to my friends 305 in a 39 Chevy This 305 has been prepped and is pretty strong The 350 is too new to really get on

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