Had these awhile and can’t remember what their for, I think the one with the master cylinder is A-body

Top one is a 70 ebody

Bottom one looks like a B-body.

1969 B-body Booster

I’m thinking that the lower one is an abody because of the later Mopar sticker. I’ve never seen one of those on an older b body, just a body.

I did part out a-bodies two 68 GTXs and a couple e-bodies in the 70s just lost track of what each came off of, those two had been under the parts washer for many years. I think I have more stashed somewhere. Just curious

Could be. I too have never seen the sticker on the '69 B-body Midland-Ross boosters I've run across.

If you think it is original as assembly, the MC part/casting number would tell you what it is.

The bottom master/booster looks just like the one in my 1973 Dart.
It was,a untouched low mile local bought new old man's car, before my friend got it.
I also pulled plenty off 73 up A Body cars when getting disc brake spindles at the U Pull It.