60-65 with the 3.55 gears isn't a problem and as drafty as these things are you shouldn't need A/C at speed, just open the vents and enjoy the breeze wink personally I think it's asking too much of a 235 to run A/C if you use it regular and want the 235 to live long

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics