Well explained,- thanks. I go it at 35 total and am trying the different springs now. Once I get it "all in" by, say 2800rpm, I'll test drive it and listen for knock or ping. I guess I got confused reading too many articles and was unsure what the best way is and what our Pontiacs like. Right now with the 35 total, I have 2BTDC at the crank (initial) and I guess 33 mech advance (in dizzy). That is an area I still like to confirm as I read Pontiacs like 24 mech advance, but also read to limit the mech advance to 14-15 degrees (as Chief has and one other article indicated) to give you ideal overall performace, cooling and gas mileage. So for my application that would mean if I add a larger bushing in the dizzy to bring down the mech advance by 18 degrees to 15, that would give me 20 initial/crank timing (roughly). Seems my dizzy is set up wrong?
