I have the same problem as you rocketsociety. I tried an electric pump & didn't make any difference. I beleive my car is running out of gas when I floor it. My car runs fine at normal speeds, but when I floor it, it runs like it has a lean condition. I have a brand new mechanical pump on with a holley/weber 2bbl plus new filter.
The next thing I am going to do is change the fuel lines all from tank to carb and clean out my tank with muratic acid and change the sock out on the pick-up.
