I'm finally getting around to wiring up the MSD ignition to my big block. I have a mopar electronic ignition distributor with a grey and black wire and the rubber 2 pin connector.

my 1970 Cuda wire diagrams are all for points ignitions

the aftermarket chrysler electronic ignition diagram just says "to distributor plug" and doesn't say which color wire is positive or negative

MSD website says the distributor wires are orange and black...mine are black and grey.

the plug from the electronic ignion box has a grey wire with black tracer also marked "fusible link" and a brown wire with white tracer.

here's how the wires from distributor plug match up to the plug from the stock electronic ignition box:

Orange box side / Distributor side
Grey w/Black tracer -- Black
Brown w/ white tracer -- Grey

Thanks for making it confusing! (distributor and orange box all came from the same source)

I'm assuming that the Black wire out of the distributor is ground, and the grey wire out of the distributor is positive?

more importantly, being a magnetic pick up that is either "open" or "closed"...does it even matter?