How many degrees do you think the crank can turn before the distributor drive gear begins moving the rotor is acceptable ?? Of course this is from a dead stop and rotating the crankshaft backwards to line up timing marks at TDC. Rotating the crank forward to TDC there is no hesitation in rotation because at that point backlash is out of the picture. I'm kinda thinking I got way too much wear between the cam gear and the distributor drive gear though. There's no way I'm going to be able to replace the camshaft drive, but I can replace the distributor drive gear, which is actually the oil pump drive gear. This is on an F 162 Continental. Suggestions anyone ??