"jimmycrack"......Typically, you would get answers on a request like yours, to be careful when increasing hitch capacity that the rest of the coach may not be able to handle the weight increase. Hitch capacity is based on; hitch, trans, engine, brakes, cooling system, frame tongue weight and some other things.
Reading your prior posts, it sounds like you're having an issue with getting the proper hitch drop. So I'm guessing you're looking for a stronger hitch that will handle more hitch drop. Here is a thought for you. On two coaches, I've plated and welded (done by a hitch shop) an additional receiver under the OEM receiver.
Don & Mary
2019 Newmar Dutch Star 4018 - All Electric
2019 Ford Raptor Crew Cab