The Aviator pump is popular with Mustang owners, Guys with GT's and Mach 1's run them as an upgrade to their stock systems.
The next step for them is a Terminator Cobra twin pump and tank setup.
The Cobra setup requires both tank and pump due to the fuel movment issue mentioned here previously, the Cobra tank has a sump in the bottom of the tank that keeps fuel around the pickups.
The funny thing here is that Cobra owners put twin Focus pumps in as an upgrade, or they go to the Aviator pumps or top of the line are Ford GT pumps.
An Aviator pump will flow more than a Focus pump, how much? I honestly don't know but it's enough to feed a moderately modded Mustang V8.