You are on the right track its close but definitely not the correct bracket. I don't recall seeing one anywhere on a 67 beforeThe one on the left almost looks like the headlight motor bracket. But the one on the right is missing the cutout... assuming I'm even in the ballpark.
I think those are power window stops that bolt to the window slide mount, ..You are on the right track its close but definitely not the correct bracket. I don't recall seeing one anywhere on a 67 before