The 440 is a good motor as is a Chrysler trans. Look for signs of any water leaks, old or new. So, you want to check the ceiling, under and around windows, doors and behind/under cabinettes. If this has an overhead bunk, you want to get up there and check everything, including under the pad/mattress.
Tires.... Check the DOT date codes. Tires approaching 7 years will need replaced. Tread has nothing to do with it.
You want to make sure the house battery(s) are getting charged with engine running. You want to also make sure when plugged into shore power, all the 120v appliances work as well as the house converter/charger, which supplies 12v to the house and keeps the battery charged.
You also want to make sure the fresh water tank does not leak, the water pump works as does the water heater. Then you have the fridge, furnace and A/C unit. Also check toilet, black and grey holding tanks for leaks.
All the chassis stuff of couse should be obvious for you. If it has a generator, make sure it runs and produces electricity.
John & Clare - Buck & Zeus - Jack & Husky
2008 Fleetwood Bounder 38P
Towd: 2 HD Streetglides