Personally, I think you're all crazy lol. Anyone who can not see the advantage of having AC in the package cars has really lost it. Just because it wouldn't have time to cool down the entire car every single stop, there would certainly be times when it did, and that would at least make me feel much better during those times. Besides, I don't care if it's still 100 degrees in the truck, If there's cold air blowing on ME, I'd be thrilled. Think of when you take a sharp corner and all of a sudden a rush of air hits you...It feels damn good, does it not? I admit, I'd still leave the doors open, and run the AC full blast blowing directly at me.
I think it would be more advantageous to have it running to the back of the car as well. It will DEFINITELY cool the back down a lot. Even a small outlet will. Most of the packages cars are already vented above the cab into the back anyway. A perfect place to put the AC going into, that would be. Run the cold air up, and you have an extra blower motor forcing the cold air in. Just the change in your day that would make is unbelievable.
I honestly don't believe that on a 100+ (hell, even 80+) day, that a single one of you, given a truck with AC, would NOT turn the AC on. Not a single one of you