I went from 15" steel wheels to 16" aluminum wheels and re-used some of the old ones. They both called for conical seat hex nuts, so it was no problem. It just depends on type of seat.
F250s have a lower payload. 5th Wheels place about 22% to 25% of their weight on the tow vehicle. Conventional towing places 12% to 15% on the tow vehicle. Just a math problem.
Another spot to consider is the KOA off Gembler Rd. We stayed here several years ago, and it worked well for us. Easy 10 minute bus rude to downtown, and it sits on the Salado Creek Greenway.I'm generally not a big fan of KOAs, but this one worked we...
Bottom line is that the stock cooler is not sufficient as Disk Doctor said, the 6.0 cooler is hard to beat. That said the right (mild) tune for towing can help the transmission with better towing shift points. I paid 4K for a BTS, but drive with conf...