Do these #'s sound right?
First off i love your car. Second off i'm not a huge fan of chassis dyno's as a predictor of real world performance. There ok for back to back testing if mods are being performed, but the overall numbers usually don't give a true measure of how the car will run at the strip.....too many other variables come into play. Get some runs under your belt to get a feel for the car and after a few full passes the incremental numbers and mph will tell you where your weaknesses are.
You have the potential of a very strong street car. And yes, if overall performance is your goal, i think you can do better with another carb.