I want toswitch outmy sport bumper and put a HD bumper on like a ranch hand. What do I need to do the swap, are the mountings different? lmk

Ranchhand should sell you the brackets for the bumper as well as the bumper. You won't need anything else I wouldn't think. I cannot speak for Ranchhand, but Alien-Patrol is the brandI bought and installed on my truck, and it came with the brackets. BTW mine is a 1999 Sport as well.