I just put a mighty demon on my 440 with lumpy cam, Edelbrock Performer RPM intake, 1 3/4 headers, MP electronic ignition, 4 spd car,
The previous owner took out the primary power valve and blocked it, secondary also blocked. The carb has 86 primary jets,88 secondary. It doesnt run bad, but is running rick just driving normally. The plugs are dark tan, is there alot to gain by putting in the PV and dropping the jets down 8 or so sizes?