i have a question with timing ? i have a 1971 vw super beetle with a 1991 13b turbo2 engine in it, the engine is rebuilt useing all atkins rebuilt kit, it has a 650 holley built for blowthrugh t70 turbo and i have all autometer guages to keep a eye on things and a lm2 afr meter from innovate, and last it has a locked out distributer, ok my question is leading and trailing where should thoes be locked at ? 10"max advance? any help would be great thanks myabe if someone has pics of where on the pully i should be at that would be great, thanks .