if your talking about the pull knob in the dash, then use a small flat head screw driver, place it in the slot as far in as you can with the knob pulled out, and then with the blade resting on the post inside, slide it out catching the torsion clip inside.
1. pull out the headlight knob, keep slight pressure while doing step 2&3
2. put a small screwdriver or pick in line with the slot on the shaft
3. pull/slide OUT on the screwdriver, this will release the tension on the clip and the knob will pull right off
when you do this, make sure you peel off the old gage faces from the insert and use a little glue to hold the new ones on. failing to do so will give you sticky needles and ur tach and speedo wont work right. not sure if you know about this or not, but just want to save you the pain of having to rip your dash apart again like I had to. enjoy ur new faces