I understand what you're saying. But 50 years ago they didn't have specially made blocks, cranks, or rods. They modified what they had and hoped it would work. They used what came from the OE. Am I wrong? I'm just trying to get the ball rolling and get back on the track. I'm sure if it only turned 7000 rpms it would be fine for the time being. Don't forget that this is just an idea as of right now, that's why I came here to find people who can help and make suggestions.