The OP will still need to purchase an aftermarket 255lph fuel pump, and get his PROM flashed to take advantage of anything that isn't stock. With a GM crate motor, or a built motor -- he won't make the power numbers they claim if he's running a factory tuned PROM and using a stock fuel pump. The stock pump can _barely_ handle supplying 14 psi fuel pressure. The stock pump won't last long. Those are two things he's going to need, regardless of who he buys his crate motor from.