Are 350 Chevy Engine parts interchangable?

The small block chevy is great due to the interchanges.

just about any part will swap over to another engine.

The major things to look at is.

1955/56 didnt have oil filters and side engine mounts

1955-67 used small journal cranks (2.30" main, and 2.00" rod

68-02 used 2.45" main, 2.10" rods but the 400

400 had steam holes drilled in heads

55-85 used a 2 pc. rear main seal, driver side oil dipstick, and 1 style intake

86-95 used 1 pc rear main seal, pass side dipstick, center bolt valve covers, and intake with 4 center holes more flat than angled like older ones.

96-02 vortecs same as above but used intake with no center bolts at all

2.02" valves can't be used on 305 and other, small bore engines cause valve will hit cyl

1955-67 heads didnt have bolt holes in the end for std acc. mounts

Let this tell you something.. For awhile on my camaro I had.. 1971 350 block, 1966 327 heads, 1970 350 oil pan, 1970 350 fuel pump, 1980 truck 350 starter, 1977 hei dizzy, 1976 350 water pump

You may have some trouble with the end bolts depending upon the generation heads on your engine, but the manifolds should all bolt up on gen 1 sbc's.

You have to look very closely at the years. Obviously the 307's and 283's date themselves, but the 305 and 400's went through some changes.

First off, the crankshafts may or may not, depending upon the journal sizes - you can swap in the larger journal sized crankshafts to the smaller ones if you have the journals turned down (and likely massage the block and counterweights depending upon interferences.

The cylinder heads interchange - except for the 400 - you have to ensure the steam holes are on the heads if you bolt the smaller heads to the 400 - otherwise the engine will overheat. Flywheels are specific to a couple of the engine sets, due to the balancing issues. The 400's are externally balanced - avoid swapping balancers and flywheels between 400's and its smaller brethren. Later small blocks have 1 piece rear seals and need to be adapted; later vortec heads bolt up, but require vortec specific manifolds (or drilling which may cause leaks).

Best bet is to source a "rebuilding your small block" book or two, which will go through the intricacies of the interchangeability. There's a lot that will interchange, some stuff that will bolt up but isn't interchangeable, and some stuff that will flat out not work without either adaptation or swapping other compatible parts.

Small Block Chevy Parts

Its hard to improve on "chevyraceman_383's answer to your question. It is very detailed and informative. However, it includes one detail that I will have to disagree with. This regards the age-old "2.02 intake valve size" versus the "small bore chevy v8s".

For years, I was a believer in the commonly accepted "fact" that the larger valve diameter of the 2.02" cannot be used with the small v8s, specifically because the "intake valves will contact the cylinder walls".

This seemed to make sense, and I accepted the 1.94" valves that were on my "whimpy 305 v8" to be the best that could be fitted on the little "red-headed, step-child, $100 used sbc engine that seemed to run better than what everyone else believed possible.

I am a master mechanic, and although I had always heard that the chevy 305 (mid-eighties smog engine) was good for nothing more than an exceptional boat anchor, I kind of liked my little 305 sbc.

I had read posts from other "mechanics" about how they had tried aftermarket performance intakes, lumpier cams, exhaust headers, bigger carbs, ect. to no avail for improving the power of the "black balled" 305 mill, as the "305 simply didn't respond to any upgrades".

Being a mechanic; this simply didn't "hold water" in theory for the classic "boat anchor, in my mind, and I proceeded to add performance parts periodically to my little runt, with a smile for each improvement to the power curve. I began to resent the "smudge" that the 305 motor had acquired with so many chevy enthusiasts, and made it my hobby to outrun the 350 sbc engines, that my friends loved so much (no offense to the 350, I like them too).

One day, I removed the heads from my 305, to rebuild them, and was feeling really disappointed that I couldn't simply bolt on a set of older "Double Hump" heads that I had sitting on a shelf in my garage. After all, they had been freshly rebuilt, but had been cut for 2.02" intake valves, thus, the shiny new SS Intake Valves would "hit the cylinder walls". ...Or would they?

What better time to test the compatibility of the 2.02" valves, than while I had the old heads removed from the block? Assuming that I was going to waste an hour of my time, but curious still, I put the heads on the block and torqued the head bolts in the proper sequence. Slowly, turning the engine over by hand, I expected some "interference" to occur, but none did. I did the same with the other head, and was pleasantly surprised again.

Well, to make a long story a few words longer, that was about three years ago. I have been driving my 69 Chevy Van, with its transplanted 305, topped with Double Hump 2.02" Big Valve Heads, ever since.

Oh, and for those who have praised the larger sbc engines for their response to big-valve heads, I am happy to say that the little 305 breathes even better with them.

It is so sad that these heads sat on my shelf for years, because I felt they could not be used on my engine, due to its small bore. So, for anyone that is "unclear" on the 2.02" valve size versus the small bore chevy block, don't assume that what others are telling you, is fact. The intelligent approach, is to take the time to investigate for yourself. I did, and am very happy with my 2.02" Valve / Small Bore v8.

Kinda' hard to question compatibility, when it just passed you on the freeway. -Happy building!

ALL YOUR PARTS WILL FIT EXCEPT MAYBE FLY WHEEL AND HARMONIC BALANCER. THESE HAVE ADDED WEIGHT TO BALANCE ENGINE. YOUR GOOD.. ALSO SMALLER HEADS MAY FIT ON BIGGER BLOCK 350 BLOCK WITH 305 HEADS IS A GOOD COMBO.

they wii bolt up but they have different manifolds for diff car and trucks

yes