i picked up a new sport with no hitch. Need to know what i need to get. I crawled under the truck and it has the bar that goes from frame to frame. Do i need to just buy the receiver part and bolt it on? Do i need to remove it and install a fully welded one? I want it to look factory...meaning you can only see the receiver. As far as what i will be pulling, the heaviest i will be going is 20 ft bass boat. Have no idea what that would weigh but looks from a quick google search to be less than 4000 lbs. Actually alot closer to 2,500 from what i can tell.