"480 calculated flywheel hp isn't too shabby considering he is grossly undersized on carburetor CFM, I bet it has wicked throttle response."

You hit the nail on the head. He'd make much more power with a better carb. A 750DP or even better HP would give him much better performace. Even a thunder 800 would..
I'm glad somebody brought up Thermoquads. I love them, however finding a good one seems hard these days.
FWIW a big 4bbl would probably run better on my car, but I've always wanted a 6-pack, I can't afford a hemi