I finally got my 3.40 center section in today. It is working great. However it is not as radical as I expected which is probaly best. It will give it more power on the bottom end. Does this change my speed odometer? It seems that I am not going as fast as it says.
You will need to change the speedo gear in trans at the end of the speedo cable . Go to a speedo repair shop in your area they will be able to help you . They should have a chart to help you get the speedo calibrated . jay-