Tom:

No problems with idle quality after installing Edelbrock TBI to batch injected MPFI via the 16197427 ECU. Did not know about the injector offset vs battery voltage. The conversion was done some 8 years ago. Purchased Craig Moates AutoProm APU1 which was of the initial production run. Talked to Craig and received some advice from him. Unaware about modifying the ECU and Edelbrock said nothing about it. Just did the conversion and it worked out. The Edelbrock kit (chose 502 cu in kit w/29 Lb/Hr injectors) came with new Intake Manifold, new Magnetti Marelli Pico Injectors, new fuel pump, and new programmed memory chip for ECU and other small hardware.