Holley TBI

I would call that the "early" Projection from Holley. As I suggested earlier, you might post it on the Holley forums. If it works it might be worth playing with. The problem is, the adjustment is limited, the destructions may or may not be available, and the system has limited sensors. Those normally don't come with an O2 sensor.

Whether or not you use it as a system, the throttle bodies may be useful. You can use a different controller with those throttle bodies, or remove the injectors and use the throttle bodies / throttle positioners in conjunction with multiport EFI.