Keep in mind that some '71s will take a 1-1/16"-10 spline clutch disc while other '71s thru '74 (and maybe newer) take a 1-1/8"-10 spline disc. So there are 3 choices: a given disc will either not fit at all, or will rattle and shake in use due to excess clearance, or will fit perfectly. This depends on which ZF your Pantera has, and is yet another reason to not 'wrap yourself around an axle' buying slightly cheaper Pantera-specific parts from a clueless parts vendor. I'd call any Pantera vendor to straighten your mess out correctly.
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