hey,
they were ment to be used when you made a chopper, with extended tubes, (staunchens?) so you could put it 5 or so inches above the lower... so you still had travel. the race guys would use them with a fender mounted on them.
so on stock cb put it about mid way between the lower tripple, and the lower fork tube. just make sure you have enough travel. ill look up the specks on travel if you dont have it.
joe
oh yeah, what did you want for the clutch plates?