rear bumper interchange
 

i got a 4 door 4wd blazer. i want to know if i go to the junkyard and get 98-up style bumper will it fit my blazer? and the put a ball on it to tow and then get rid of my hitch so i can tow. is it a good idea? i can get the bumper for free. Also how much cana ball on the bumper pull?