Need help and info to help out my autistic son with his project

People saying "it can't be done" are just lazy. Just use Hi-po manifolds, a 3 lb clearance hammer and some solid mounts. I put a 400 block in my 65 and it looked like it was made for it with manifolds. Headers are Pro-parts on the driver side, passenger side is almost a drop in for generic B/RB headers. Your steering column will need to be trimmed to the wall and the shaft may need to be machined down .060 where it passes the manifold or hit the manifold with a grinder. Good luck, they fit, its the exhaust that hurts. I also spaced my K-member off the front clip with 3/4 nuts to give me some more room in the trans tunnel.