I have the same engine, same year, and I have had several V-10's. The one thing I've learned about the V-10, is they will pull at high RPM's all day long without an issue.
I also have the same engine in a service utility truck I use with equal results in high RPM's.
I've done the same mountains, and just came back from a three week cruise and a two day cruise yesterday through the mountains.
I will add this, the V-10 performed a WHOLE LOT BETTER with a premium synthetic oil. I picked up my phoenix cruiser V-10 on June 17th, and today I just turned 7,500 miles.
I used the break in oil for the first 7,000 miles and changed to a quality synthetic oil and words can not explain how different the engine runs now. Smoother, quieter, "seems to have more power quicker" and runs cooler.
So, don't be afraid of using the RPM's to the max on these, they will take it and beg for more. One thing I do is change the oil much more often when I running RPM's for long periods as for me it seems the equivalent of running a rave car on the track, or a drag racer running full out.
The other caveat is the weight of the coach and the weight of the jeep. I did have one Class C with a basement that I overloaded along with towing a HEAVY Jeep Rubicon. That was a 30 mph hill climb through the Rockies no matter what I did.