Hmmmm..... adjusting it used to be a PITA for me. There is a special tool that Ford would use to adjust it. You just have to play with it little by little to get it just right in the end, I ended up swapping a t5 in anyways.
2000 Mustang GT-Former giggle gas addict
1990 Mustang GT w/ Vortech V3
***resident gun idiot***