I feel your pain!
I don't have a one-off duck combo & have a wiring harness for my sbc.
I'm having issues with software & firmware in bench testing. I think I'm getting it figured out.
We are installing the ecu & harness starting this weekend. The motor is out of the car for time changes & freshening. Once installed I'll bench test the issues in the car.
Sorry, I'm not an expert on this stuff. I fumbled my way through the Sniper set-up I had, but Holley doesn't support that system anymore.
Your best bet is to go on the Holley forums to try & get help.
1700/781L
