ninos,
You'll probably get a better response if you ask the question at
A Part of the TiffinRVNetwork • Index page. Somebody over there probably has one of them.
Some things to consider. Tiffin is still in business and their crews in Red Bay can and will give all kinds of advise, help and service if needed. Cummins is still in business and has a reputation for a fine engine. If it is a properly maintained engine, it is very low mileage and barely broken in. For it's time, the 330 was a pretty big engine and should handle the coaches needs very well. My coach is 6 years newer and I'm only have a 350 in it. The new ISLs are running 425.
The heart of the coach, house and chassis, is how well has it been maintained. If it has had the proper service, been repaired as needed, tires changed, washed, waxed and kept clean, it should make you a fine coach. If not, it could be a major migraine.