I have FiTech on my 451 stroker ( the Holley wasn't available yet). I used the Aeromotive Phantom fuel pump, and used new 3/8 hard line and black braided line to make new fuel lines. I think I have about $1600 in the whole set up, including buying a new fuel tank. That said, the Phantom pump is great. The FiTech still needs some tweaking. I don't have many miles on it yet, so perhaps it needs to keep learning, but so far I can't say it infinitely better than the carb I was running. Starting is about the same. Cold accelerating is way better than the carb, but once the engine is warmed up I can't tell a big difference. I will continue to tweak it, but as of now, I can't honestly say that I would do the fuel injection again. The Phantom pump, however, is awesome.