If I understand correctly, you can destroke a 350 chevy block to 302 cubic inches by using a 3.00 stroke crank.  I can't seem to find one anywhere.  I know the original 302 in the Z-28's used a 327 with a 283 crank, but I don't have a 327, so there inlies my problem.  Any help would be much appreciated.  Thanks.  

You're right, a 4.00" bore block (used with the 302, 327 and 350) along with a 3.00" crank will net you 302ci.  The 302 was intro'd in 1967 to compete in Trans Am racing, and was essentially a 327 block (2-bolt mains) with a forged 3.00" crank.  In 1968 and 1969, the 302 block had 4-bolt mains (identical to a 4-bolt 350 block).  The 283 did use a 3.00" crank, but they were not forged.

You will have a difficult time locating a forged 3.00" crank - but there out here if you're willing to spend the $cratch.  You could also have one custom ground if you desired.  You'll have an easier time finding a used cast 283 crank.  A cast crank would be fine if you limited your rpms to about 6,000.  But, that would be hard to do with a 302 - trust me on that.

IF you get a block from like a 95 caprice or a truck thats a 350 and get a crank and bottom end from 4.3 v8 / 262 from a 94 caprice than do your mixin and matching and you'll come up with somthing like a 306-ish...or maybe its closer to a 302...either way its a big bore/short stroke combo.
Likes to rev....but the crank are iron im pretty sure.

The 262 comes with a stroke thats close to 3.00"...maybe 3.10" and has rods that are longer than 5.7...I think 5.865ish somthing....the rods will accept a standard 350 piston too....watch your deck height though....I havent done all the homework.

Beware though that the 4.3 v8's in the caprices/impalas where only made for about 3 years. So theyre harder to find than the average junkyard treasures.

Lemme know if I got somthing wrong.

-Shred

You got some right, and some not so right...

The crank from a 262 does measure 3.10" and installing one in a 350 block will net a 312ci motor.  All 262 cranks are cast.  The length of the con rods used in a 262 are the same as every other production small-block with the exception of the 400.  They measure 5.70" whereas the 400 is 5.565".

* The 265 (Chevy's first small-block), had a crank which measured 3.00" - same as the 283 and 302.

Im not sure if we are thinkin of the same engine.

The 4.3 v8 Im talkin about was only made for 4 years in the full size chevy cars. Im pretty sure the rod was longer.
its the l99 small block released in 94 and was actually 265ci...sorry bout the foul up.

the bore for the engine was 3.75" and the srtoke was 3.00".
2.1" rod journals and 2.45" mains. one piece rear seal.
Cast crank.
5.940" rod length.

-Shred.

Your specs for the '94 265 are all correct with the exception of the rod length.  All small Chevys - with the exception of the 400 - used a 5.70" rod. 

If you are looking for 8000+ rpm from your 302, I'd say look into a name brand forged crank... or even a billet one, they come in whatever size you want.  Of course you have to have a reputable machine shop balance everything, and your pistons, rods, and rod bolts better be top quality as well.

If you aren't looking for that kind of rpm, then just keep it a 350 and put some 302 badges on it, and tell everyone it's a 302. I raced a stock bottom end 355 for 3 years, hitting the 7200 rev. limiter chip in the burnout more often than not, and that motor is still running around (with different heads and cam) in an old truck that I sold 4 years ago. (and the added torque from the extra 48 cubic inches is nice, too)

I'd just like to add that the late model 265 does in fact use 5.940 long rods, not 5.7's.

OK.  I've never known of that, but I've been wrong before.  

hey i agree with yellochevell or what ever his name just turn that 350 into an 355 and youll have an kick a** motor but if u must have an small cubic inch motor try an 307 crank in that 350 to net u an 327 i got that advice from chevy high performance.  

ok i want to point out that i have in fact made 2 302's one is a 1957 265 block bored over .125 and yes they will take it, and all chevy crankshafts before 1964 were FORGED and in some cases TUFTRIDED
my next one included a 1963 327 block with a 1964 forged 283 crank and it is an exact replica down to the 291 heads and comp cams bluprint 302 cam