The Stovebolt Site Forums The Shop Area The HiPo Shop 336 Pontiac in a 58 GMC

Thanks. That's a lot of good information. I'm thinking I can buy a crank with 389 size mains and the stroke of a 455. Bore the 389 .080 and use a stock 455 piston. Another issue is compression. It's going to be sky high with almost all of the Pontiac heads.
I found a pair of 114cc heads, 1973 I think. Which should put the compression at about 9.5

Let me know what you think might not work with this recipe...could save me some time and money

Thanks,
Greg