Thread: Which one's better,327 or 350?

Tweet

Hambiskit,
265: 3.750 bore x 3.00 stroke
283: 3.875 bore x 3.00 stroke
307: 3.875 bore x 3.25 stroke
302: 4.00 bore x 3.00 stroke
327: 4.00 bore x 3.25 stroke
350: 4.00 bore x 3.48 stroke
400: 4.125 bore x 3.75.stroke
Note that the 307 and 327 have the same stroke. If you put a 307 crank in a 350 block you get a 327. Doing this requires 327 pistons because wrist pin location is different.



joker51,
All the first generation small blocks are dimensionally the same EXTERNALLY. That means you can pretty much bolt one in place of another regardless of year, displacement, etc. Also, heads and intakes can be interchanged from one engine to another. The exception is the 1955 - 1957 blocks which do not have the motor mount bolt holes on the side of the block. The 1955's do not have an oil filter. Some of the later 70's engines do not have the holes drilled & tapped in the front for the '55 - '57 style mounts, but the bosses are there and can be drilled / tapped. Internally, different bores all require different pistons; different strokes require different cranks; rods are the same length except for the 400; 1967 & later blocks & cranks have a larger main journal than earlier ones.
To answer your original question, yes you could destroke and sleeve a 350 down to a 283 and you can bore & stroke a 283 up to 350, but the cost would be prohibitive.

Thanks J, so I can't build a 283 but I can take it down to a 302 if I wanted to, Ok that at leasts gives me a few more options on pistons. Maybe I can find the pistons cheaper as 327 or 302 rather than 350

Originally posted by joker51
Thanks J, so I can't build a 283 but I can take it down to a 302 if I wanted to, Ok that at leasts gives me a few more options on pistons. Maybe I can find the pistons cheaper as 327 or 302 rather than 350

J, wow you're really trying out some parts interchangability here. Many of the early stuff can be swapped, but...

Looking Inside the block, there are different characteristics. For instance, webbing on a 283 is different than a 350 block due to the difference in clearance needed for the counterweights on the cranks. There is a lot of swapping you can do, but it sometimes require so much mods it's cost prohibitive. Speaking of cost, you're only luck of finding cheaper pistons for a 302 or 327 is if some parts store has some laying on the shelf that they just want to get rid of. If you check out the big racing mags, when they list 327 (good luck on the 302) pistons, they cost just as much as the 350's or more. Same on rods, plus good luck finding a steel 302 or 283 (3" stroke) crank. Thinking about the 327? There are still cranks available for this setup. Watch the 307 "look a like" crank that's all cast and different counterweight setup. If you go that route, check clearances first and stay below 5500 R's.

Good luck,

TJ

350: 4.00 bore x 3.48 stroke
Where can I get a set of sleeves on the web? Price?

Who sells sleeves for a small block chevy 350?

*amn, that wore me out reading all that. To quote Don Henley " the more I know, the less I understand, all these things I thought I figured out, I have to learn again."
Kelly

350.........like said before, there are so many parts out for 350's...........also cheap to build, i've had two 350 powered vehicles and never had any probs............My camaro started of pushing around 320 to the wheels and now i'm close to the 4's.
Will get it re-dynoed to see after the last changes........

327 is the one!

327 --- 3 twenty seven! sounds much better than 350 or like most say now since they are .30 over: 355 LOL!

JUST THINK ABOUT IT: some 327s are 40 years old already. they only made em for about 8 years!

ahhhhhhh a dressed up 327 in original corvette trim with that small balancer turnin & a pair of double humpers on top of each side of an old aluminum intake! (what a sight! its priceless)

OOOOOOOPS heres a 350 in disguise. the small balancer is on its way! an old polished AFB & a coooooool old air cleaner will top it!

There's no replacement for displacement

Originally posted by L00se Deuce
OOOOOOOPS heres a 350 in disguise. the small balancer is on its way! an old polished AFB & a coooooool old air cleaner will top it!

I have a 327 from a 63 corvette and I tried for you look but you got a lot more shine and fancy on your engine. Well I kept it low budget.

Originally posted by L00se Deuce
OOOOOOOPS heres a 350 in disguise. the small balancer is on its way! an old polished AFB & a coooooool old air cleaner will top it!

I have a 327 from a 63 corvette and I tried for you look but you got a lot more shine and fancy on your engine. Well I kept it low budget. Nice job Ed ke6bnl

YES Ed i like the looks of that 327!
it looks real nice!!!!!!!!! i almost used those ol 327 covers too. i like those valve covers! but i just couldnt bring myself to paint em red!

327s the ol 27s shall live on fOrEvEr!

the GM (Chev) techs got together with the BiG time engine builders & the 3.....twenty seven was born & still running strong!