I own a 2002 F150 SuperCrew with a 5.5 ft bed and a 5.4 liter engine. I have found a 23 ft 5th wheeler that weighs 5500 lbs (K-Z Jay 23JFS). Is it safe to pull this weight with this truck or do I need a bigger truck/engine. Any comments/suggestion will be appreciated. This will be my first RV purchase so I need lots of help in deciding what to purchase.