[chewychevy67]

You could get it on 60s and 70s corvettes I believe. There are definitely hei distributors with the tach drive available. The reason I went with tach drive/mechanical tach is because I was worried that the 60's transistor ignition I used would not be accurate with a electronic tach. I know some 69 camaros came with this ignition factory and used mechanical tachometers so that's why I did this on my truck but hei should be more accurate.