Re: Early Bronco Fuel Injection.
there are a few problems with the GM system - they're less efficient (compared to the SEFI ford system), and you have to get custom chips and parts to support more than a mild engine combination. now the efficiency differences are obvious, so i won't touch on that. but the adaptability of the ford fuel injection system is something to be mentioned.
i'll start with an example - there's a guy up in colorado ('you readin' this, coby?) that's running a 423 windsor based stroker with off the shelf mustang and lightning parts. the computer? stock. injectors? very readily available (and cheap!). intake? stock cobra and lightning units. harness? stock. and the beauty of this system - NO CUSTOM PROGRAMMING. the computer is able to learn the correct fuel maps and adjust accordingly. in this respect (and many others), the ford SEFI system is far superior to the GM TBI.
now on a comparable GM system - the harness, TB unit, and computer would all be stock. but you'd have to round up some hard to find injectors that would be capable of supporting this kind of motor (the aftermarket doesn't support hot rodding with the TBI system too well - most go to the TPI for a stronger motor). you'd also be stuck on a dyno trying to determine what your output curve on your engine looks like, so that you can get a chip burned for your ECU that will tell the computer how to handle your engine. ultimately, the cost of this one may exceed the Ford SEFI after you add in the time spent tuning the system. and that doesn't even begin to take into account the time you're going to spend trying to tune this setup. that's the beauty of the ford SEFI - it's adaptable, and you dont have to spend time tuning it (although you certainly can, if so desired).
i'm not saying the GM system won't work - but IMHO, i don't think it's the choice for someone running anything but an engine closely resembling the motor it came off of.