i have a 16 valve 745 gle. new valves, old ones bent. when the timing marks are right on the cam shafta where does the bottom line up to . since the belt snapped(a bunch of i told you so's) the timing isnt right which timing mark do i go by for the crank shaft ? there are three to four possible marks that line up to 3 to 4 different things. which timing mark should it be right now cyl 2 and 3 are at tdc . thanx jippi