The only question I have is... Does FAST allow for larger than stock fuel lines?
Somewhere (I'm sure someone will post a link to it) is a chart that shows the amount of fuel needed at HP levels.. and if I can remember, for a 500HP motor, you should be able to deliver 1 gallon of gas in 30 seconds..
With that said, for the first 3 or 4 years, I was running my 525HP motor with stock 5/16 fuel lines and the best volume I was able to obtain was 1 gallon in like 40-45 seconds..
I've since upgraded to a larger fuel line and if FAST allows you, you should upgrade also..
Good luck..