Lowest cost 400 stroker

Like any other chinkesium head. They need rechecking and finish work. If you do that, I'd drop back to the 470 or 451. You're gonna see 600 plus HP real quick. Do you plan on running a stud girdle?

I think the BB will withstand alot more than you give it credit. I bet you could get to 1000 hp pretty easy, assuming good tune.

Anyhow I'm not trying for that. Good heads would also help low end though.