Originally Posted by AJrollin

The play that you are feeling is in the rear large pulley and small one. Over time with a hot mod motor the small pins in the jackshaft /layshaft will slightly wear the slots in the plastic pulley's. I simply put a couple drops of CA in the slots and it locks it down great...no more play. I don't think its that big of a deal and I've never had a pulley or side belt fail, heck a year on this car and still all original belts. My car is stock with a 6.5 and it's been the most reliable wheeler I've ever had.