[Nanook]

Originally Posted by Arne

Take a look at this. Pretty sure the owner (Bob Ashlock) can set you up, regardless of what the original tach was for.

https://ashlocktech.com/tach-adapt-1

100% agree...just purchased one of his units and I am using an original 8 cyl tach with a 6 cyl. (It also will work with the HEI)