[STL Mark]

Without knowing the specs of your engine, and taking you at your word re: horsepower estimates, I would suggest a couple of things.

1) Have your current set-up dyno-tested for actual performance figures. Your dyno-tech may even suggest some enhancements to your current set-up that you may appreciate. And, you'll at the very least have a "before" picture of your engine.

2) Do a bit more research about Webber, and EFI set-ups. You may find that the "Look" you seek comes with a hefty price tag. Prepare for money well north of $7000 - just sayin. I'd wager that you'll probably have to get a different cam in that beast. Most of those set-ups require a specific cam grind, and I doubt the current monster cam you undoubtedly have will fit the bill.

3) Think about dual carbs. They have "The Look" too.

Honestly, if you are making 750 HP with a 650 carb - good on ya. Why mess up a good thing?