Both the command center, and a pump will require a line back to the tank. The FCC just uses a "vent" opposed to the constant return of the inline pump.
It'd be very easy to just swap out your current regulator, and inline pump, and just run the return type external pump. Unless you want to get into something as extravagant as an aeromotive drop in sump or tank.
Using the fcc with an existing electric pump seems double redundant to me...
very easy to just pop a bulkhead fitting in for a return.
FTH-40005 - FiTech Fuel Injection Inline Frame Mount Fuel Delivery Kit - Master Fuel Kit
Aeromotive - AEI - AEI18688 - Phantom Stealth Fuel System
Aeromotive - AEI - AEI18688 - Phantom Stealth Fuel System