Rotor Suggestions (I'm sure I am overthinking this)

there's no "frame" on our cars. they're unitized body construction. front subframe, rear subframe and sheetmetal in the middle.

so when somebody says "frame off" all the pedantry comes out...
You know what you are correct it shows my ignorance. It was a 57 chevy 210 car he was working as well. Now that Im thinking about it he did have the the k member I believe its called and some other suspension parts hanging up. I have a lot to learn!