Had the Challenger out recently after sitting most of the summer. It seems to have developed a miss while feathering the clutch that I don't recall before. Added 8 gallons of new fuel to top off the tank, other then that it is as parked in June. The plugs are clean and light colored and would seem a little lean if anything. Any ideas?
340w Holley 650DP, Mopar 484/284 cam, FBO ignition 12 initial, 35 max. w/vacuum advance.