This what I was figuring. If the early Pantera used the same ZF 1 as my 'goose with the shorter shaft, then it would need the crank adapter or the bell housing would have to be shorter. RT66 says that he doesn't have the adapter in his pushbutton. There is either some difference in his input shaft length, his bell housing or someone removed it and he's running dangerously without it like you described. I was told the same thing about the 'goose, that it needed the crank adapter for the shaft support. I guess that I'll find out if my pushbutton has it when I get around to separating the trans from the motor. I would assume then that the clutch disc for the ZF-1 equipped Pantera also has to be a chevy 10 spline with the nose machined off. If you didn't have the adapter, then a standard chevy 10 spline would have fit. If this is correct, then a vendor selling a clutch disc for a ZF 1 Pantera would have to have a modified chevy disc.
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