Good 400+ HP 360 build

Without, big cam, compression, or killer head flow, I think 400 is going to be hard to do. I think mill your heads, run some thin head gaskets, Howards 710461-10 (you could have the same cam ground on a 108 or 106 to bring up the cranking compression), headers, performer rpm, and a good carb would make for a nice strong runner. probably be 350hp maybe more, but strong torque. Should work well 3.55 gears. If you want more hp, spend some time with a grinder, or have some body do a good pocket port.