400 big block with b-body headers & 4 speed

I haven't personally done the swap, but from what I've gleaned off members here, the B body headers may fit without modification, but expect to ding/dent a tube or two. As for the 4 speed part...not sure. Have you looked at bigblockdart.com?

I just looked up the Pro Parts headers at Bob Mazzolini Racing--I didn't see any for B bodies, but their A body headers for BB are all over the place...actually kinda curious about this one myself...