Thanks. I did adjust my throttle cable so that it tops out around 3200. But my cables and cable clamps are on the "abused" side I would feel better about having a solid stop.
If someone could measure the thickness of the metal, I could fab one up (just want to make sure it clamps down correctly) - or if someone has a scrap bin and comes up with one, all the better.
I'm replacing fuel lines today - While I'm at it, I'll probably see if a cabinet brace will suffice.