In this video they drag race the old V-10 vs the new 7.3 in motorhomes. But the more important thing is the tuning Ford did to the F-53 Chassis with bigger sway bars to make the motorhome drive better. They also drive Box Trucks.
I would be interested in seeing the new 7.3 Godzilla engine in the 33' Class "C" motorhomes.
Anyway enjoy.
https://youtu.be/aEkfiqHi8uY