I'd "guess" that the B-trucks were pre-wired for AC, as all their AC units were added at the dealers in the US, and were pretty nice factory-looking/factory acting units. The difference on the dash is the AC push-in switch, a block off plate is removed and that switch added. I'm not aware of any B2200 using anything but Sanden 708 (there were several types of these, minor differences.
Similarly, these trucks' carburetors had a second unused "cam" that was there in case Mazda cruise control was added, and wiper delay upgrade was simply a different wiper switch.
Post was last edited on May 03, 2016 07:04. Edited 1
time.