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Well, as I posted in another thread on how my Tach signal could only be picked up off the (+) side of my coil, which I knew was wrong, I did some surfing and found out that the the wires can actually be reversed without any problem, as long as all of the positives and negitives are switched...

I purchased my '68 Cuda just over a month ago. I'm going through some diagnostics on a detonation problem under medium to heavy load. Timing seems to be OK, I still need to check the total advance (I think I have too much total advance and need to adjust the vac. adv.). I'm running the MP Elect...

OK, I have installed hundreds of Tachs over the years, pretty simple actually, 3 wires (4 for lighting), one to ground, one to 12V switched, and the third (green) to the (-) side of the coil. Can someone please explain to me why I get no tach signal unless I connect it to the (+) side of the...