My reasoning for going with a programmable ECU is simple: Stock EFI systems are built & tuned to specific specs, engine displacement, projected & metered flow of air & fuel, injector duty cycle, cam profile/timing, & so on.
Unless you can get it on an analyzer & retune it, a junkyard EFI & ECU is not much of an improvement over a carb. Sure, cobbling a system together & using an ECU from another engine may work, people do it all the time, but will it be the best option for the engine, it's power, & overall efficiency?
Just my own worthless oppinion (as many of them are) but if someone was just gonna half a$$ it, spending the money to get a better intake with a 2bbl or dual 1bbl, & have the carburator/s tuned to the engine would make more sense. It will still scream, & with alot fewer little things waiting to crap out on you as you're passin through the intersection of BFE & you got a purty mouth.
