[Turk]

Jamo,
In the dual setup, with mechanical (providing it is not drawing fuel through the electric pump) you don't need to flip the switch for the electrical pump before you floor it. Carter or Holley both could keep up with any flooring I did with 2 fours.

If Brent ends up with a mild motor like mine, you DO hear the electric pump, because where it is mounted and how it resonates because of all the aluminum in the trunk.
To me it is loud enough to be annoying.

I also disagree with 40 gallons being sufficent fuel not to run out!. It is kind a like the old Harley Davidson set up. You run out of fuel and flip the reserve, you are good to go for another 50-60 miles.
Believe me, time to do it is now...not later! 10 feet of fuel line doesn't cost that much!

TURK