The truck has the later model 6 bolt power disc brakes and power steering on it. Using an 8" wide wheel front and rear with 235/70R15 with a stock 3.73 gear. Rad has one extra row of fins when I had it re-done. The timing has been an issue as I kept changing it a bit when I was towing my fiberglass camper trailer that weighs about 1800#. Never seemed to find the sweet spot for it. The enclosed trailer weighs about 2800# empty.