Am truly sorry I haven't been around for a while. Am currently working from 2PM till 4AM and I just haven't had time. Had another buddy tell me another way to test the tach on the car and as soon as I get off these goofy shifts (few more days) I will check it out again and get back to you. Sorry for not getting back to you sooner. Also told another person on this site that I would look for an e-body fuel filler tube and haven't found time to do that either.