I just got one from rockauto.com. It works so I thought it was a good deal. I am still getting a little bit of bouncing around but not as much as before. I also show a few miles per hour more than what I am going. I think I need another speedometer gear to match with the 4.30 LSD that my 85' has. It worked fine in my 83' with a 4.10 when I had it.