Hi BJ
I've had one of the older EZ-EFI systems on by cobra for a couple of years now and it has been good I've had little to no problems with it. I followed the instruction when installing it to the letter and when finished it started first go and idled straight up. I did fiddle with the air fuel ratios a bit but was nothing. The only thing that has gone wrong was a sensor stuffed up I rang FAST up and they let be know of part and as it turned out it was the same part as off a V6 commodore which fitted straight up plug and all.
As to do with the ADR I cannot comment but for me the system has been good I hope this has helped.
