Thanks for the info, I have replaced the speedo cable and housing a couple times but speedo takes fits more so when cooler weather outside, it will jump from 10-100 and everything in between and sequels like crazy until I reach up and disconnect it .The tach has never worked even after replacing the burnt board on the back of the cluster never had a points dist in the car so I can't say if it worked with points or not but I have tried a filter with no success. I am going to hook up an aftermarket tach and see if it will work to determine if I'm getting a signal from the coil .