Installed this clutch recently in my -74, works like a charm. Hayes part # 37-220 for the pressure plate, 40-108 for the disc and if you need a new throwout bearing it's a Federal Mogul 1625-T. It has to be press fitted on to your old hub and that you can only get from the Pantera vendors (the hub that is).
By the way, the pressure plate has three arms, I think that's long style.
Michael