Should have followed up sooner on this,
I ended up replacing the rear bushing with a new one (this is pressed in) and also the front brass bushing (this is the one held by the bolt and washer). Most of the wear turned out to be in the front brass bushing.
Once the new parts were in, I was completely satisfied with the amount of play - it was minimal.

I don't think the bolt and washer actually fell (those were where they are supposed to be upon dis assembly) - the brass bushing didn't spin out but rather as it wore, it dug the grooves into the block. The old bushing felt very loose. The new bushing almost had to be hammered in so it fit great.

I have been using the FSM through out this build. By the way, I did get the engine to run prior to dis assembly and it didn't sound too bad - had been parked for 10 years and Injection pump control rack was stuck, once freed up, it started and idled just fine.

Bottom line:
1x 6150520150
1x 6210520106 (this matched the one that was in there)
fixed the play.

The engine now has about 800 miles on it and seems to be doing good. I will have to post more stuff once I have time. All suspension (front and back) has been rebuilt, now dealing with paint.

Here is a pic of the engine going in:


Here is a pic of my made up tool to spin the oil pump with a drill in order to prime it before starting (This was a great idea and I highly recommend doing this so you don't turn over the engine dry):