I am running 10 degrees advance at idle and I am deaf to the point that I have not been able to hear a car ping except when the 70's cars would run on. I got some low octane gas,low 80's in Calif. About the engine,I had the head milled .090 and had to releive over the valves for .060 clearence and the cylinder bore is .040" over stock. I am runnung dual exhaust and intake with Carter YH carbs. and a mild cam. Car converted to 12 volt.
