I would start by changing the oil, engine, transmission, and differential, look into changing out plugs and wires, and possibly a radiator flush. This is assuming you have not done these things already.
but today was an unfortunate day for my pony.. she hit twice. the first time a several deer's charged in front of me on a dirt road. then after I relaxing at the lake with my friends a cop rams the side of her at QT. but thanks again I'll but that on my todo list.