There are a few mods posted on here about adding extra fridge fans and Modifying the AC unit to direct the air better. I only have 1 AC in my fw and could barely feel any in the front bedroom so I tried the mod and it works alot better. If your AC is like mine it blows straight down on a plastic cover then is supposed to blow out the into the ducts. I got a piece of down spout eaves trough and an elbow and was able to put the elbow up by the fan and attached the downspout to the elbow and into the 1 side of the duct work. I still have to do the same to the other side yet but you can feel the difference between the side I modified and the side that is not. I may get with a friend of mine that does ductwork and see if he can make me up something better.
2004 Dodge Ram 2500HD Cummins
2017 Keystone Montana 3820 FK
2009 Harley Davidson Ultra Glide