i have a 69 ram air III gto motor in my firebird right now i have been trying to find out exactly what the timing is suppose to be but i hav it set at 8 degrees before tdc. and seems to be fine also you should think of changing it over to a hei distributor. because the person before me had points and had a detonation problem too. so far after i have rebuilt it and changed it over to a hei i have not had a detonation problem. good luck with it.

-joe