[skyking]

lift the template up front so it follows the windshield and tops out at trailer height. That was what I was proposing. It will have about 17' of straight before it goes on back down the back side of the template. I was just thinking that top window edge is a bit of a storm right there, and since I am going up 14" or so, I could optimize the transition from window slope to long horizontal section.
I'd mount the aft portion of fairing on a headache rack at the back of the cab and a couple of suction cups on the roof forward. The back would have the leverage to hold it, the cups would just stabilize and minimize any possible flutter.
The back end of the trailer will be as ideal as possible, with tumblehome when possible and planwise taper as well as follow the template. Gently gently!!