I thought you always added your initial timing to your mechanical timing to get your total timing. My mechanical timing is set at 35 degrees at 3000 rpm but when i back off the throttle and let it go back to an idle and check my initial timing its set at 8 degrees initial. So therefore id subtract 8 from 35 wich is 27 so i have 27 degrees of centrigul advance in my distributer. And when you add 35 degrees mechanical plus 8 degrees initial that is 43 degrees total timing.