I had Jeff at Advance dial in the Petronix dist in the Spring and that solved the black carbon fouling on the plugs.Car ran great all Summer idled great and pulled strong with a steady exhaust note.Recently I had let the gas in the tank get too low and rusty gunk clogged the filter....changed filter and blew out the line to the tank.Ran better but still running rough. Car has been running with a bad miss...runs rough on acceleration....better at idle....the plugs are badly carbon fouled again? There is a a bit of gas seepage near the jet area of the front carb(maybe the seal)? I'm wondering if some crap got past the gas line filter...past the electric fuel pump??? and into the front carb? Also am wondering if the dist rotor(has a nick in it) and cap contacts (which look less than new) might be complicating the issue? Only a few months on those? Or is it the dreaded Petronix malfunction? Any advice on how to isolate the problem?