If it is designed for front disk/rear drum, and mounts on four studs your good to go. The later master cylinders have larger fluid capacity than the early dual circuit master cylinders. Be sure to beef up the fire wall where MC mounts.
If the new MC you have is an aluminum two bolt, plastic fluid tank type, you will need to fab up something to hang it off the fire wall. There are four to two bolt adapter plates for sale, but you may as well just fab up something where the four studs are missing.