70 dart 470 ci drag car build.

That's a good point. I think most kits are .134 wall because of this. They do that because at .134 they are still usually at least .120 at the thinnest point.
Yeah he was happy when I told him it was a .134 cage but I added those other bars without knowing mill specs lol. Guess I learned something and didn't have to have it the hard way.