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

400/451 in a 65 A...These pro-parts headers fit better on a 440 as they are higher on the inner fenderwell and go over the inners better. Still need to expand the tunnel for the 727. Yoou can run J-bars from the firewall to the lower radiator support as Mike did and you can cut the inners out for super header clearance. Angel wing headers like Hedman Husslers fit with little mods. Road Runner Hi-po logs fit, great option for a little warmed over 440 too.