Thanks for the help and suggestions guys...
For the record, I did call VintageAir and spoke with a guy there named Roy. He suggested that I could buy the standard system for the front (74168-LCU-A) and then add one of their "Slimline" systems (about $300) to retrofit into the rear factory A/C compartment....
Not sure if that's going to be the cleanest way, but it does sound like I have options.....the more I think about it I also really like the idea of just trying to get air ducts back there instead of an entire second unit. I'd just have to test it to confirm that a front-only system would have enough capability to cool the entire truck. The 'Burb is definitely a
BIG box of hot air in the summertime.
