Quote:
Problem is the OE tach responded to the pulses from the points distributor, quite different for being compatible with a transistor ignition..
The tach's internal circuit board needs updating..
I had RedLine Gauges update my ralley tach to be compatible.
Just my $0.02... 
The pulse width of the stock electronic ignition was similar in duration to the breaker points ignition and the same voltage. The original factory tachs for each ignition system are identical and equally inaccurate.
2014 Ram 1500 Laramie, 73 Cuda
Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango
Only previous Non-Mopar: Schwinn Tornado
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