That master cylinder may be correct. Description says it is. The early ones with bolt on top looked very much alike. The drum/drum master cylinder had a shallow reservoir. Disc/drum master cylinder casting was deeper to hold more fluid. Hard to see the difference looking at only one.
There's so many companies now that are selling drum master cylinders with the residual valve removed from the front brake outlet, theres a 99% chance that's what they're selling.
According to those Chrysler master tech booklets, only the drum brake masters had castings with the bolt down caps.
