The Tach is a Sun Super 2 Had a Mopar Performance Electronic distributor, went with a 440 Source HEI street distributor. The car performs so much better except the tach bounces all over. I bought a filter, filter has 3 wires, Red to negative side of coil black ground and yellow is to tach filter post. I believe that the yellow should be tied into the green tach wire some where below where I tied the red wire into the green tach wire to the negative side of the coil. I'm going to try to wire the red filter wire directly to the negative side of the coil to see if that makes a difference. Working on a honey do list at the moment.
