It's a good engine, but for a 33,000 lb coach, 330 hp is adequate but not extra. Are you sure the Ventana weighs that much by itself? Or is that the GVWR? My 40 foot American Tradition is 32,700 loaded for travel and 37,700 with the toad on the back. It is powered with a 370 hp Cummins ISL.
The rule of thumb is that 100 lb/hp is adequate. You will slow down somewhat on long steep grades with that much hp, but that is how most motorhomes are powered. It's a compromise between power and fuel economy.
2004 American Tradition; 2013 Buick Verano
Homebase in the Ocala Nat'l Forest near Ocala, FL