FYI if the Fuchs have useable rubber on them they go for $600 + or -.

 

I need an altitude compensation 'box'. I'm not sure where it is, I did not take it from my '86 parts car and my late engine needs it (I think). Maybe someone can chime in as to it location and value.

 

Art.... Unless you drive your car continually from Colorado to the coast you shouldn't need that box. From looking at the wiring diagram it looks like a switch.
That's just my educated guess though.
As for the location I believe it's above the passenger side footwell.