OK ,I bought a B&M short shifter kit form Howell engineering and also a new knob, the knob has a collar that slides on the shifter shaft, and then the knob just slides on until it is seated and there is a hex screw that you tighten to hold the knob in place, the collar is threaded on the inside and it slips up and threads on the base of the knob and that gives the boot something to hold on to. I am sure Pep Boys, Advance or Auto Zone or Modern Performance all sell aftermarket shifter knobs.