grant kustoms bumper

I just wondered if anyone had any advice on how to build the bumper brackets for grant kustom bumpers. I got the sectioned fullsize bumper that fits on the s10. If anyone has any advice on how to make the bumper brackets or pictures that would be great thanks

i would use the stock mounts, but spot welded to the backside. im pretty sure they use carriage bolts to hold them on.