Are you talking about the selector valve that switches the vacuum signal to the rear end? I have a complete valve and the linkage to operate it, not sure of the year of the truck it came from. If I ever make use of the rear end it came with, I'll be using electrical solenoid valves, not the mechanical one. Got a picture you can post?
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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