BrianHill6:
I found this in a vehicle I parted some time ago and asked about it in the WIW forum. Check it out and see if its what your looking for. The vaccuum servo to control it was shot and I may still have it. I definately have both speedo cables as well. LMK if I can assist.
http://67-72chevytrucks.com/vboard/s...d.php?t=534216
Mike