Ray:
To keep the starter together while reinstalling, drill and tap the case and the end plate for a little clamp strip that will hold it all together and make your job so much easier. This strip remains on the starter for easier removal, next time. I used a longer screw and added the washer to compensate. Nuts shown in 2nd photo will be removed, of course.
To make the long stater bolts "catch" the bellhousing threads easier, file a taper on the
front of the threads. You can also buy those bolts at Lowe's if you need too. Placing a bottle jack under starter to support it also makes it a lot easier to install.
For "provenance sake" make up a historical data plate and secure it to the outside of the starter case. Just a neat thing to do. Mine tells what parts were used to convert to 12V by owner, location and date.