You can also use a tach calibrator like the one RT Engineering sells. Attach the DC connections to a 12V supply and the calibrator to the input.
I had an old one I cobbled from a filament transformer and a capacitor to simulate the engine but due to CRS I cannot remember where it is to tell you how to make it.
Is that a B3 cuda with black vinyl? Mine is B3 with white top and stripe.
Craig

Last edited by denfireguy; 09/21/09 10:07 AM.

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