[Fordestes]

IF the crank and cam gears are new aftermarket, check to see if the gear has been marked on the wrong side, the crank gear timing dot should be on the side with center flush with the gear face, there is about 1/8 inch offset on the rear of the crank timing gear, it may be mis- manufactured and marked on the wrong side while running the gears may be trying to correct the centering by moving the cam gear forward. I would check the cam gear also , I find some of the name brand parts have been shipped before the mistakes were realized thus creating a hair pulling problem . is it possible the add on dist. drive is incorrectly made ? Having two engines in succession with the exact same problem sounds like some mis-manufactured parts . Keep us in the loop.