Hi I have a 07 SR5 V6 4x4 that has the factory V6 hitch on it and I tow our 18.5' boat with it every weekend. The boat with trailer ways aprox. 3500lbs is there any reason to go to a diff. hitch? I used it all last year with no probs but I know the V8's had a better hitch set up and there are aftermarket one out there too. Would you guys keep the stock hitch with that weigt or upgrade? Thanks for the help!