Thank you for all the responses. Its not dieseling it continues to run normally, I do use 93 octane gas (Mobil /Exxon). No fans. I do use Seafoam every so often. There is a high idle. I let it warm up before I attempt to move it but the car is real cold blooded. I know there is a different cam in it has headers, double pumper carb, electronic ignition, bought that way so not sure exactly what I have. When starting cold, there is no choke, you have to run it, ( pressing gas pedal or it will stall) at about 1300 RPM, after about 5 minutes it will idle down to about 1100 rpm in gear. It's funny because at that point I am backing it out of the garage and it will want to stall. Once I back out of the garage and start going forward it runs fine. It seems very strong to me, sure keeps up with traffic. Very responsive with slight pedal pressure.
Thanks again, John