Have that on my old Honey... need to do something like that eventually. I just stuff a blanket on the floor when the heat gets to me too much or go sit in the back away from it when it gets too much at this point. Longest trip we took so far was last summer to Yellowstone... that is when I finally stuck a blanket down there to block some of the heat. ( our cab air doesn't work and that doesn't help matters, we run a generator and run the house air on the road in summer.)
Martha (AKA RVM45), Bob, and Bess the Border collie
22'Honey Sportscruiser on a 1988 Ford Econoline.
Sometimes towing a powered Parachute.