I have a few hemi motor mounts/brackets out in the garage. How do you tell the difference in them from A, B and E body?

I got them from a guy that used to have an original hemi A body and a 1967 hemi gtx. He said the gtx didnt have the motor in it when he got it in 1970, so I dont think they came from it. They have the originl paint on them and are race hemi orange.

will get pics when I can.