It's a lot more money but......
Have you considered a tune? There are several out there and 5-Star is a popular one on this forum.
This is another one that claims over a 50HP and over 70FT-LB Torque gains:
https://www.ultrarvproducts.com/Ford...-Custom-Tuning
I did try the 5-Star Tune in my 2018 Outlaw 29H V10. It did seem to help with some power and the shifting. I took a small fuel economy hit but the performance was better.
That being said.... and I'm not knocking the V10.... but after owning a 30' Class C with the V10 and now a 35' Super C with the 6.7L Powerstroke Diesel, it is clear to me that the V10 is being pushed to its limit in a rig that is almost 15,000lbs.
My Super C is pushing 20,000 lbs and the performance of the 6.7L Diesel can't compare. There is plenty of power with all the weight and room to spare.
On top of that is the fuel economy. I just finished a trip where I averaged over 10MPG while towing a trailer with my Can-Am Spyder. When I carried the Spyder in the Outlaw garage, I was lucky to get 7MPG.
Granted there is a big price difference between the gassers and the diesels but when it comes to a heavy rig being adequately powered, it is clear to me that the V10 is about at its limits.