Hi all. Looks like I need to make up a set of sill to chassis mounts. What size steel do you use for this?? Some say 80x80 others 90x90. All i have is a big chunk of 100x100 box. Is this too big?? How have others done this. Im a novice welder at best and just looking for any tips any of you might have to make the job easier? Cheers.