[Paul Rose]

I've always heard that clutch discs are balanced, but that you shouldn't count on pressure plates.

An article on FordMuscle.com recommends that you bring along your pressure plate when you have your engine balanced. Of course this doesn't do you much good if you have to replace your pressure plate later...

EDIT: nevermind, I just read Mr. Fixit's reply more closely. That makes sense. Balance w/o pressure plate, then "fix" the balance of the pressure plate.