Another 2 systems are Megasquirt. They have many different systems. MS2, MS3, more and they are very popular for the do it yourself and very cost effective up front.

I have a Pro M on a fox Mustang. They also have a hot rod set up or universal system. It is a full management system. I can answer any specific question about Pro M. If you can imagine it, it can do it. It is a Mass Air system. Most are Speed/density.