There were two input shafts used on Panteras, and thus two different clutch discs.
Dash 1, not used on many cars,was different than Dash 2.
I'm pretty sure they had different diameters, and that would probably mean different diameters on the guide tube.
But if you are having trouble mating parts that previously mated (prior to ZF rebuild) then obviously your rebuilder should be expecting a call from you.
Larry
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