I had a chain jump on a 302 in a bronco. Was pulling a trailer with it gone camping and out of town, flat out quit. I yanked dizzy and advanced it a tooth, ran stronger than ever, the chain jump must have advanced the cam (maybe where Ford wanted to put it in the first place?). Three weeks later it puked the chain for good (I wasn't about to give up driving it, ran too good). Moral of the story, if you think it's sloppy it probably is. 'Specially like Shady said if there are nylon teeth involved.