[bigd65]

well it seems that i found the problem. the springs (after market) were all to light and letting the advance plate open all the way up at WOT. i barrowed a dial back light and set it to TDC. when i would raise the rpm's it would go to 25* and if i would gas real hard, i could 30* to come around. that is with no vacuum advance, only mechanical. well i also barrowed a distributor from same guy and is springs were heavier and wouldnt let the whole advance plate go around. i put on the heaviest stock springs i had and set the timng to 12* and went down the road (back road ) very little sparknock. so i came home and checked it again and i could get 25* to come around but had to gas it hard. so i set it to 8* and hooked everything up and that was that. now i know i need a new DIZZY. one with the adjustable advance limiter bushings built in