FWIW My buddy has a '70 gtx with an Indy headed 572 hemi. He runs a smaller cam (in the .690's to my .737) His car wieghs 200 lb less and runs 4:30's to my 4:10's. Both cars have 572ci, run 8 inch converters, single dominators, run on pump gas and have the same size and brand rear tyre. We both run caltracs and our 60ft are equal @ 1.39 best. He went 9.80 @ 139 and I went 9.79 @ 138.7 on the same day.
He hasn't bested that yet but I've since gone 9.71 @ 140. I think his car would pick up HP with a similar lift cam to mine, I would obviously run a better et at 200lb less and with 4:30 gears. I think these cars would still be pretty close given the above but I still rib him that I would be infront
When I first started out racing in '89, Hemi's were way expensive, you could build a higher HP wedge for the same money so I guess I've stuck with what I know. That having said a hemi does look really impressive in an engine bay but everyone expects a hemi to be quicker than a wedge.
Advantage wedge in my humble opinion