P.S. I still think since they're almost new, you should consider keeping the 7.5 to 1 truck slugs and consider turbocharging. It would take a bit of scrounging in the boneyard to find a pair, but two carbureted draw-through turbo set-ups off of a pair of late 70's-early 80's 3.8 Buick Regal, Park Avenue or Riviera 'T-types' would be cheap and pretty easily adaptable. Years ago, I used one of these sets ups on an otherwise bone stock Slant 6 in a '79 Dodge pick-up and it worked like gangbusters. For the the hemi, you could use two complete set-ups and mount one on each bank. You could swap out the stock Q-jets for a pair of Thermo-quads...invert the stock truck exhaust manifolds, make up some bracing tosupport the turbos and bolt the turbos to the manifolds. Since the carbs on the Buick set-up attach to the turbos, rather than to the intake manifold, you could even keep the original 2-bbl truck intake and just hog it out a bit and have the two turbos feed the compressed fuel-air mixture into the intake through some piping fabricated from 2-inch steel exhaust tubing and a flange that would bolt on in place of the 2-bbl truck carb. Two stock Buick turbos would be a bit oversized for a 331, but not grossly so - and in light car with the proper gearing, I think the lag would be manageable. Once they got spun up though, even at a 'relatively safe with stock pistons' 10 lbs boost, it'd be a hell of a ride! Best of all, with some judicious scrounging and some basic homebrew fabrication, it could be done on the cheap and allow you to use a lot of the parts you already have.