I'd prefer to keep the dash color original, and its brown

Guess what color my truck was........

On mine, the fan switch damaged the controls and I found out that the entire switch assembly was exactly the same as one I had out of a '78 B-body. The only difference was that the car one didn't have chrome buttons.

I guess I'm trying to say that some of the stuff can be sourced from other models.

Whhere are the vents with the add on system? Under the dash? Would it be possible to add factory vents to your dash? (to keep the brown).