yah, i am going to be building a bumpr and i think i want to have the ball fight on it and i was wondering how strong the bumper brackets are? or if i would have to modify them?

Have you thought about making the bumper with a receiver hitch in it? You would be better off, you have a modular setup if you do. If you lift, you won't have to have a funky angle on the trailer tongue, you can just get the appropriate drop stinger for the hitch.