I'm rebuilding my original 1969 engine. It's a rare 350 cid 014 4-bolt main engine for my "4th week of Oct 1969" Camaro. But I want to buy a new forged crank. I need to know what the proper throw length should be. They come in 3.5", 3.75", and 4" throw lengths. Any ideas, gentlemen?:hurray:

350s used a 3.5" stroke. (4" bore x 3.5" stroke = 350)

a 3.75 stroke is for building a 383 stroker type displacement, bigger like 4", well, you get the idea.

350s used a 3.5" stroke. (4" bore x 3.5" stroke = 350)

a 3.75 stroke is for building a 383 stroker type displacement, bigger like 4", well, you get the idea.


You mean 3.48" stroke? A 3.5" stroke and 4" bore is a 352.

Thanks again to the experts!