I put a E body 8 3/4 rear end in a Demon once, and didn't like how close it was to the wheel wells. I have put B-bodies in A-bodies and liked them, especially the 65-67's.
I think piecing together something from my junk pile (along with some good pieces I've had laying around), will make a great race and certainly a great time for what Jahaba is putting together. I think he I doing the same thing - using what's handy. No high dollar rollers either way.