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When I bought my '61 the tach didn't work since it was electronic ignition and the distributor didn't have cable drive. After a while I just got tired of seeing constant 0 revs, a faded dial and burned out bulbs in the dash.
A couple of weeks ago, when Zip Parts had a special 10% discount deal, I ordered the electronic replacement tach. Thursday we replaced the tach and replaced all the old bulbs in the dash with LEDs. Wow! What a difference to drop my eyes now and see a vividly colored tach that works and a dash that glistens like the Las Vegas Strip.
i didn't do anything before installation except connect the leads from the tach to make sure it would work. When I saw it was responding to throttle input, and was showing the idle speed of ~800 rpm's I knew it was good to go. I left the dip switches on back of tach as they were when I opened the box. I had a cheap tach I had bought months earlier from Amazon that was connected, it just set in the passenger floor so I had bench marks from that.
After installation the rpm's matched the Indicated speed from the speedometer as it did with the other tach.
Electronic tach replacement...
