95 Bounder 34J--rear leafs--shop recommendation

First you need to weight the unit and see how much it has on each axle. Then if heavy on the rear put in new spring set to correct the load, not add a leaf. You are talking weight here, your fix is going to cause you many issues. My 99 had over 5 foot extended add so the same issue.

If just a temp fix then air bags on the rear and it up put the weigh on the front. At the years this chassis has on it I sure the springs are in need to be re arch or new spring set for the correct weight.