First thing I have done is replace the following
Spark plugs, spark plug wires, rotor, distributor cap, radiator cap, tensioner, tensioner brace, serpentine belt, fuel filter, air cleaner and filter, IAC.
I also changed the oil and filter, coolant and rear differential service.
Up next will be the transfer case, front diff and tranny service.
It already had a new radiator, alternator and battery