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383 SBC question

#1
hey guys, got a question regarding building a 383 sbc. I have a 355 sbc motor with a cracked cylinder. It has forged 5.7 rods and Speedpro L2256030 forged pistons. Will these rods and pistons work with a 383 Eagle crankshaft or do I have to purchase new pistons. I have another 350 block I plan on boring .030 over and would like to build it into a 383 if I can use my current rods and pistons. Thanks, Kyle
 
#2
It use to be that you would use the 400 Chevy crank and turn the main bearing journals down to the 350 size. Use the 400 rods (5.65") and the 350 pistons. Deck height would be close to zero. Work for me on several 383 and 388 Chevy motors.
 
#3
hey guys, got a question regarding building a 383 sbc. I have a 355 sbc motor with a cracked cylinder. It has forged 5.7 rods and Speedpro L2256030 forged pistons. Will these rods and pistons work with a 383 Eagle crankshaft or do I have to purchase new pistons. I have another 350 block I plan on boring .030 over and would like to build it into a 383 if I can use my current rods and pistons. Thanks, Kyle
No. Like topfuel724 says, either 400 rods and 350 (1.56 ish comp. dist.) OR 5.7" 350 style rods and 1.43ish comp. distance. Think about it, how would it be possible for the same rod/piston combo to work with a 1/4 stroke increase? I know guys did it, personally, I cant get real excited about a 383 with the short 400 rods, and I wouldnt touch an eagle crank with a barge pole.Honestly, not that excited about 383s in the first place, and I have built a few over the years. But they are the current flavour of the week, so...
Personally, I like the offset ground 365/370's better, you pick up the reduced bearing speed of the sj, and you can go to a 6"rod without putting the pin in the ring land, but no one sells pistons anymore, because all the magazines want to write about is 383s, they gotta keep that tasty scat/eagle payola rolling in. Guess I am dating myself now..
 
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