Good discussion. I don't see how that Holley throttle body is any different from those used with the pro-jection but understand the primary difference is in the ECM. Holley has been at the FI game for years if not decades and has not gained much of a foothold in my opinion. I doubt there would be either the Avenger or the MSD had it not been for FAST proving the market existed for a guy to convert over to FI without any programing background. I do have an open mind and would consider the Holley. How does the Holley fit a drop base? It appears that since the throttle body is so low that the throttle linkage would never clear a drop base air cleaner without something in the order of a 1" spacer between the throttle body and air cleaner. Moving onto the ignition issue, I did find this that may allow me to use a small cap HEI distributor on my Pontiac: http://www.davessmallbodyheis.com/ If that would work, I think that would give the Holley system a serious advantage for me. Newschool, with your FAST system, are you talking about clearance with the actual rails or the fittings and crossover attached to the rails. I was looking at that and was assuming the crossover would have to be swapped to the other side and different fittings used. Maybe hardline??