2 bolt M/C ?

Some Aspens and Volares had manual disc brakes and the aluminum 2-bolt master cylinder number used by Cardone & others is 10-1821 for those applications. I have that on my race car and it works fine at the track with the OEM combo. I have the original proportioning valve as well. Not sure how it would be in every day street driving. Power brake application has a different #.

Your full size truck M/C may require a higher pedal effort (bigger bore) and I don't know if your # is for a manual or power application.

The slanted M/C may be from FWD cars and/or Dodge Dakotas. They would have a smaller bore and I've heard some people say that the FWD versions are not recommended for RWD conversions. You can use the larger capacity reservoir from full size truck/van applications on the passenger car M/C by trimming some of the tabs underneath the plastic body which are in the way when you try to use it on a non-original M/C application. They both have "straight" tops. Just the truck version is bigger than the car version.