A 12:1 FMU, stock injectors, and an inline pump are sufficient to run 8lbs of boost. I wouldn't run much more than that on a 12:1 setup though, since your fuel pressure under boost is already in the 130psi range at 8lbs of boost. If you want to run more than 8lbs, look into larger injectors and a standalone unit.

The SOHC GReddy kit only comes with the 12:1 FMU and MAP signal control box. The 12:1 FMU raises fuel pressure 12psi per lb of boost, and the MAP control box makes sure the MAP sensor voltage stays within spec to keep the stock ECM happy. If you figure a stock intank fuel pump can produce ~80psi max, and the 12:1 FMU is raising boost 12psi per lb of boost, even at the stock boost level of 4-5lbs, you're pretty close to maxing out the stock pump(assuming base fuel pressure of 32psi, at 4lbs of boost, that equals 80psi of fuel pressure). As for an inline pump, you can use any high-pressure pump you want. A relatively cheap alternative is to look for Bosch or Aeromotive inline pumps out of the DRAG kits, since people who upgrade to larger injectors usually don't need their inline pumps.