I have a 1994 World Class T-5 trans in my 1990 GT FOX. I do not have a shifter knob. My friend gave me a random billet knob off of a PRO 5.0 shifter but it doesnt seem as if the threads are the same between this and the stock because it wont screw on more than 4 threads. The knob is fine and so is my shifter. I like the look of the stock knob on a 05 and up so will a stock 05-07 Mustang knob fit ? What will work wont ?