Either burb rack, regular or z71 will fit. The z71 rack is a little harder to take apart. Take a set of allen and torx keys (i dont remember which) and a cordless impact if you have it and penetrating oil even if youre not in rust country. Grab some extra screws and crossbars off of other vehicles, if you can. My LYJ had some vehicles with busted racks so the owner didnt care.
The reg rack is ok. The z71 rack is a little nicer. The bars are all in line if you want to run more than two cross bars. The reg rack has a slight front to back curve to it so three bars arent even. The z71 sits a little higher, it also has a roller in back to help with loading long objects, and it has an area on the back rail mounts that you can fit rear facing LEDs inside. It was originally intended for backup/tailights but Ive never seen one with the factory lights.