Thinking about buying a RAM 1500 Quad Cab, 4x4 with a 4.7 with auto. I don't do much hauling/towing but what would any of you say are the limitations of this engine? It does have a factory towing package. I live at over 3,000 feet above sea level and it does get rough here in the Winter. Also, I have an all steel 17' flatbed trailer rated at 12,000 lbs. I doubt this truck would be able to haul that kind of rated weight. Any thoughts on this too? Thanks!