With a small block chevy, you can always go the ram horn type manifolds. Speedway motors has em. they look pretty good for manifolds. And you can get them in stainless and polished stainless. Of course if you want headers that hang over the frame then that won't work. I have heard they preform pretty well. Again with a big hp motor and you want all the power at over 3000 they probably wont do.