For WJ - Remove factory bumper fascia, grind down small sheet-metal lip under uni-body frame rail, install shackle tabs and frame rail mounting plates, reinstall bumper fascia. Grinding required, no drilling required.
Oh I forgot. The bumper will fit almost any winch up to 9500 lb but it is designed for low profile winches so that it does not obstruct radiator flow. Protofab makes the bumpers for Truck Farm so here are some direct links. http//www.protofab4x4.com http//www.truckfarm.com