I started with a base 1/4in plate, cut to fit around the current frame and bumper mounts. If you didn't want to do a removable winch plate setup, I would recommend welding the plate to the frame, or if you were building a custom bumper, you could weld it to the braces that bolt into the holes alongside the frame rails.
In order to fit a 12k pound Rough County winch, I cut the hood support brace, and welded a new brace into place that hugs closer to the condenser. This gave me an extra inch to work with to keep the winch plate from sticking farther out in the front.