yeah, it's gonna be a learning experience hearing the engine run over 5000 rpms.
It's normal and going to the full beans at around 5000 rpms, like has been said, is not out of range when on the grades.
Also, slowing down to 50 mph up the grade is nothing to fret about either.. Just part of the deal when towing a heavy brick behind you.. :)
If you ride bikes, what happens when you hit a grade? You gotta downshift, pedal faster (rpms) and you slow down and you work harder.. :)
V8 will rev just as high and be just as loud. My little 3.5 V6 turbo F150 is still the top engine over the 5.0 V8.
Anyway, I'd keep what you got and just learn to adjust your towing expectations to a level equal to the task at hand.
Good luck! Mitch
