with all those miles i would say replacing all those old internals and maybe droppin' some new stuff in there too like a flywheel and maybe a diff. if you race at the track or will be modding.

1999 Cougar V6 MTX SVT UIM/LIM/65mm TB, I/H/E, Fidanza/SPEC III/Torsen, Koni/GC's, 19" Icon wheels w/ Pirelli rubber, NX Wet Kit