Panterapatt, 1971 thur 1972 Panteras use 1 or 2 ballast resistors, 1973 thru 1974 use a "resistance wire" that runs somewhere in the dash. I have 1972 so I don't know where exactly the wire runs, but from other BB threads that's what I remember.
You should get about 10-11 volts when the starter is turning, because the resistor or resistor wire should be shorted when the starter is engaged providing maximum voltage to the coil. This is done because of the voltage drop by the starter load. For a short time, enough to test, you can operate the coil directly from a 12 volt source just to see if the engine starts.
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