Emergency brake cable mount differences

[cadillac_al]

I have another odd dilemma with my old K20 frames. The mount for the E brake cable is usually a stamped tab in the side of the frame. My 75 K20 frame has this beefy bracket riveted to the frame to mount the cable. I thought they must have changed it to the stamped tab to save money and labor in 1976. I checked my 74 frame and it also has the stamped tab. This makes no sense unless my 74 does not have the original frame. Has anybody else seem this type of bracket? I have a pic of them, the stamped tab is on top and the beefy bracket next.

The other odd thing is this beefy exhaust hanger. I have never seen this on any of my other square bodies either. Has anybody else seen this beefy exhaust hanger?

oops gat a security message when adding pics. I will try to add them in the next post.