Thanks for your input. Not slowly getting worse, its just not as responsive as it was. Its the original untouched engine so with that compression ratio I'm thinking 34-36 total advance should be good. The kit came with 3 sets of springs, one busing and 1 set of weights. I rebuilt the dizzy 3 years ago and know the vac advance works and springs are good and lubed the weights, so nothing stuck and I took out the excessive play. I'll start from baseline and check timing next week, record initial, mechanical advance and total and go from there. Rocky Rotella wrote an article on Pontiac Engine timing and suggested to leave the original weights in place. Only use bushings and springs to get the timing right. I know I have the initial set at 12 believe I was able to get to 36, but don't remember the RPM. I'll record everything and post current settings on here. I think you're right that my curve is just not there cause once the car moves it goes with no problem. I can also hear a slight miss fire at idle and know its ignition related. More to come....