Carb to Injection conversion

A friend of mine had a truck with the Holley Projection unit. That one is a throttle body injection (TBI) like the stuff from the 80's/early 90's. It has a control unit that you "dial switches" for all sorts of fuel control. He had hours into tuning it, was very patient... and hated it... The thing would have run the same, maybe better with a nice carb. TPI (like edelbrocks) or a magnum engine conversion I dont know about, but have been interested in it myself. From my experience with aftermarket ECU's on fuel injected cars it takes a tuner who knows the stuff, a dyno, and lots of drive time to get it dialed in. Somebody on FABO has a 318 magnum with the injection still in place. Do a search, or he may chime in..