The pulley for a 1600 would since the PTO gear case are for practical purposes the same. I guess I would need to look at a 1650 PTO housing again. The last pulley I looked at say 5 years ago and do not remember for sure. In 16 years of working for dealer I can only remember us selling one of them. We did put a front pulley on a last year&#039;s production 770 that did not have a power booster..