Yeah, tried the inductive pick-up, no dice. Had a MSD GMR pick-up that I think does pull a signal from the cut-out wire but the output signal from the GMR unit isn't high enough voltage to drive the tach. The tach will run from a dummy ignition using a early 4 pin GM HEI ignition and coil with a Chrysler pick-up. but the coil has to be in the circuit to run the tach, the signal from the 4 pin HEI on its own won't run this tach.
Never tried it, but what about pulling signal from stator wire going to rectifier/regulator?
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