RLDSL
You have pictures or more details of how you did the rear air conversion? Did you also install a heater with it? How do the controls work? How did you run the lines to the rear of the cab? And where do you have the A/C blow out of back there? I've been thinking about this also, but can't figure out where to do the vents.
And when I'm putting my truck back together I plan to do all the above, possibly including rear air.
Thanks,
Jeremy
Do a search, I posted it when I did the install with pictures.