The rollers?
Are you talking about the winch fairlead?
If so I made the front bumper out of 1/4 wall box tubing, cut a wedge out of the back to bend it to match the grill, welded that up, then cut 2 rectangles out of the front and back for the cable, and bolted the fairlead to the front. I have seen another 1st gen truck with the fairlead on the factory bumper but he had it through bolted to some brackets he made up behind the bumper.
Basically I wouldn't trust the factory bumper mounts to hold up to any off angle pulls without reinforcement behind it.