There's a long thread about care and feeding of old Dodge based Class C's on this forum. Safety tips: Don't drive on old new looking tires with sidewall cracks, they can come apart or blow underway with much damage to underside holding tanks from flailing belts or loss of control. Change out any rubber brake lines, they can come apart internally and cause sudden hard pull to right or left. Install propane leak detectors and smoke alarms. Test all propane lines and connections for leaks. It is likely you'll need a modern converter/charger, 12 volt auxiliary batteries and related electrical parts to power all interior lights and appliance controls. You may need to find an electrician to check out/troubleshoot 110vac circuits safely. Buy a Chilton's overhaul and maintenance manual for the equivalent model Dodge van should include basic chassis wiring schematics. Buy a generic operation and maintenance book from an RV supply place. Take advantage of this and other online forums. Old Dodge vans have carburetor, ballast resistor and electrical connector and fusible link and automatic choke issues. Our '72 B300 started in reverse and ran over my foot then ran across the street after I had assembled the carb/transmission linkage wrongly. ( Know your limits)