Mechanical FI will not make you happy on the street, and only maybe on the track. If FI is what you're after, you might want to check out this
Fuel Injection System being produced by Quality Roadsters.
There is a temporary hiccup I'll mention in that PRO-M who supplied Mass Air Meters to just about the entire FI hot rod community was sued out of business by Granatelli and is in the process of being restarted. Supposed to be back up in a couple weeks.
Frank