What a great resource this forum is ! I am in SE MN, west of LaCrosse, WI and north of Decorah, IA. I admit to having a lot to learn. The plan is to install 4BT in 21 - 24 ft class C motor home. It will probably be a Ford E350 with GVW 10k or less.
Cruising at 55mph and getting 20+...