[67cheby]

the guy i bought them from says that the bottom hole of the bumper to frame hole gets taken out and you replace it with a bolt from the backside of the bumper into the bottom bolt hole on the guard, you leave the upper bumper bolt in and there is a little bracket that loops over the top of the bumper . however in the pic i posted of the other truck with them on they arent covering the factory bumper holes so i am not sure completely , my bumper is in my attic and i havent gotten it down to look yet