I have a 1990 Dakota 3.9 5-speed manual and want to add a trailer hitch. There is a company named Curt that makes them for my model ( Extend Cab LE ). Has anyone added a hitch to a Dakota model like mine? What will it tow? I am considering a 21-foot recreation trailer. Thank you in advance to anyone who responds with the info that will help me here in Vancouver, BC.