Replacing front and rear roll pans with bumpers on 85!

[Mparker]

Hi all, I'm new to this site and this is my first post! I just got a 85 swb and it has front and rear roll pans on it! I want to add bumpers, anyone ever do this! I ordered bumpers and brackets and the came today! I'm aware that the frame had to be cut a little in the front but will be using the outer brackets only in the front. Can I just cut openings for the brackets and mount bumpers or will I have to cut them all the way off? Any help/advice greatly appreciated