Are you running it with the V-6 tune or did you burn a custom prom? I am using the 1227730 ECM on my project also. Are you using the ECM to control ignition timing?
The guy that made my harness supplied a prom with it. I'm not sure what kind of "tune"is burned on it.
As far as the distributor I've got a Mallory magnetic breakerless distributor that I modified to lock out the advance and used the pickup coil only for a trigger. I used a GM 8 pin module with an external coil and then have the ecm control advance......I guess all you wanted to know was the last part.
