Possible to put a 1991 318 fuel injection on my 1973 318?

I swear it's made by Holley

Yup. Holley-made throttle body, Holley or Bosch injectors, Holley fuel pressure regulator and low-bid in-tank pump by I don't know who.

Yeah, the one when you let off the throttle fast it revs back up to like 1800RPM then slowly comes back down?

Yup. Lots of fun when you're trying to do a 3-point turn or maneuver into a parking space...your choices in shifting between Drive and Reverse or Reverse and Drive are either wait til the idle motor decides to take its Ritalin and calm the hell down, or do an enforced neutral-drop. :roll: