On my '83 4wd 6-spd, in the engine compartment on the driver's side up above the master cylinder--what the heck is the black can with multiple wires, a vaccuum hose, and a cable that attaches to the accelerator cable down at the linkage? The FSM I have is an '87 and I can't find a mention of that darn thing anywhere. What does it do, and, more importantly:
Where does that long vacuum hose connect to?

Thanks!
Jim