did you use the Spec TOB?  lol oh and as FastCougar found out...the Quaife gear set will only work with the 4 cylinder cause the input shaft that comes with the gear set is made for the 4 cylinder tranny.
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
| 
