Mounting my angle iron for my mudflaps on my Class A

Probably too late if you already have the mud flaps, but we have always used a Protect-a-Tow. No mud flaps. Others of course feel differently I'm sure.

Also, I believe I have been told that manufacturers prefer people to drill frames rather than welding. Again, others may have more or conflicting statements about this.

Just some options, take or leave....