Ok Think i have a problem I set my initial at 18 with my vac unhooked took rpm up to 3000 rpm My timing light showed 17 I was at zero on the pulley tried other initial settings if i took it down to 8 or 10 and put rpm to 3000 vac unhook i dialed the timing light to 35 and it showed 10 before had to dial timing light back and zero showed up at 20 total timing has to be way off at chain and cam. There was no way to get total at 35 kevin