With those pistons still being a mile down in the holes it doesn't really matter what kinda lump of iron you put on there, it will still be a dog. In this stage I think compression ratio makes more power than headflow.

I agree with the '71bee here that in stock form I take a closed chamber head anytime over an open chamber smoghead. There's more than just this .5 point of compression gain. With proper 0-deck (dished) pistons there's also quench-effect to be achieved.

In true redneck style one could ofcourse put a .100" slab of JB weld on the pistons to increase the CR a bit...