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So no one has successfully gotten one to work with a modern ignition or even if it did they still suck??, I wouldn't mind if the response time was slow, I would just like it to read within 200, I am pretty sure the guy I sent it to replaced the "board" but said he had no way to calibrate it or something like that. I had planned on using a shift light anyway, I have an autometer tach that will work a shift light and was just going to mount the tach under the dash or something as the light is on a wire that can be mounted off the tach. I had the tach mounted in front of the clock but I got the clock working so I hate to cover it up.



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...