On the Fitechs I've heard about some people having problems and other people not having any problems so I don't know what the deal is. I've heard nothing but good about the Fast units. I've decided on the Fast with the Tanks Inc. fuel tank. Going to order them after my trip.
I haven't had any experience with aftermarket EFI on a small block, just that 472 Hemi so we'll see how it goes on my 5.9.