I just went on a 1200 mile round trip loaded with a 9K 25' TT camper. I ran her hard staying 80MPH on the freeway and 70 MPH on the highway. Pulled a few grades going 70 and she stayed right there. I never actually had WOT and actually accelerating up hills. Highest EGT i saw was 1240 degrees. Some of the trip I put the Juice on zero and other parts I was running it at 1. I've got 305's on a 20" rim too. My MPG really sucked though. This was probably due my speed though. I averaged about 9 - 10 MPG. I just can't seem to do under the speed limit if the truck is capable. But it all felt rock solid and ran like a champ. It did get a little hot during the later half of the trip but nothing to be alarmed about.