Well, I made my trip so I thought I'd let you all know how it went. On the way to Idaho, I loaded the Eagle wagon on the trailer backwards. I had to move it nearly all the way forward to make it balance, so this made the gap between the back of the truck and wagon as small as possible. Traveling a steady 70mph, even holding speed up the long grades, my mpgs were 14.2, 14.4, 14.6, and 15.6 (last fill had about 25 miles without trailer). On the way back, I loaded my 71 Dodge d100 forward and hit the road. I also held 70 mph, but this truck was heavier and had worse aero. The mpgs were 13.0, 14.2, and 14.6. I haven't filled the truck since getting home. This was with the camper shell and my home made air dam that I previously mentioned. I can take and post a couple pics if anyone is interested in seeing.
Travis..
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