What you'd want is a roof vent like the Ventline # V2092SP-28 with a taller ceiling garnish part # VA0445-37 which is 5-5/16 inches tall and can be trimmed down to a shorter length appropriate for your ceiling opening. view full answer...
For that kind of capacity you're going to need a universal weld-on hitch like the Curt Class V # 15902. This fits frames from 18" to 44" and has a gross towing weight of 15,000 lbs and tongue weight of 1,500 lbs. If your frame is larger you can use the # 15903 which fits frames up to 60" instead. Make sure to consult your owner's manual for your towing capacity. You will be limited by whichever capacity is lower. view full answer...