I have been considering the FITECH as well. Everything that I read and hear is good. I called them a couple of months ago about what I am building and it all makes sense. I am building a 72 F100 with a 351W and I have the Ford Racing ECU and harness(foxbody style) setup for it already, but the ease of installation and no dyno tune makes me reconsider using the FITECH.
90 LX Triple Black Vert, 306, B303, Cobra 1.7 Roller Rockers, GT40 ported iron heads, Cobra intake, shorties, 65mm TB, 73mm C&L, 24lb injectors, Cobra front brakes, Lincoln rear discs, 3.55 gear, sub frame connectors, strut tower brace, Bilsteins and coilovers, Flowmaster Thunderseries