Holley TBI

The 670 CFM throttle body should have 2" bores, the 1 11/16" flows 550 or so. Holley was the OEM manufacturer for a lot of systems which is why their own stuff is a mix and match. Such as Mopar style injectors on a Rochester throttle body.

As stated above, the basic Holley computers were pretty basic stuff. For not a whole lot more money, a Rochester system can be (EPROM) adapted. This would support an O2 sensor, knock sensor, and full ignition timing control. The Megasquirt will also do a lot of cool shiz, but there is a Geek factor involved.