"my 2 cents if you have not done it already is to check timing."
Using the timing light on the balancer, the readings from the timing tape match the electronic distributor display. I think the timing (rotation of the distributor) is correct. Next week I will check with Tommy Hodges about the cam degree. He assembled the motor. Perhaps that is a factor in this engine needing a lot of vacuum advance at idle.
The engine is running well and the dieseling is gone. I am happy with it at this point.