Originally Posted by 4 Jaw Chuck
1967 302 Chevy's used a 327 block and a 283 crank (3.0 inch stroke X 4.0 inch bore small journal crank).
1968-69 302 Chevy's used a 350 block and a 283 crank (3.0 inch stroke X 4.0 inch bore, big journal crank).
All had 5.7 inch rods I beleive.
All these engines were produced for homologation in the Trans-am series to compete against the 302 Ford Boss engines that dominated at the time.
All 283 cranks are forged
so you can use any one to create your engine, just make sure you get the right size journal block to suit. You can get spacers to fit a small journal crank into a big journal block or have the crank ground to fit, I don't recommend either. Why you would want to destroke a perfectly good 350 or 327 is beyond me? Are you trying to get into a specific class of racing?
They don't sell 302 crate motors because everyone wants the bigger cubes. Here's a site with a good breakdown of Chevy engines.
<a href="http://www.v8s-series.freeservers.com/sbc.htm" target="_blank">http://www.v8s-series.freeservers.com/sbc.htm</a>
67 283 cranks were not forged...