For the Ford F53 chassis I highly recommend Koni FSD shocks. The FSD stands for Frequency Sensitive Dampening. Have them on the front of our 2000 coach and they really work great in providing a smoother ride.
You may want to check with Desert Mobile R V Repair in Las Vegas Mark and Michael don't know if they go to Pahrump but you can check. Their phone # is 702 379-7966.There's also General Quality RV Mobile Repair phone #702-859-0505 Keith Lawson owner....