Some progress has been made with the engine tear down.  So far it looks as though there's some wear here and there, however the overall condition is not too bad. Pictures tell the story.

No roller rockers here! Pushrods will be replaced as the ends came off two of them, and I found a crack in another.

Another view.

One head is off.

Some pitting on the top of this valve. This was the only one affected.

The rest of the valves looked like this.

Some carbon build up on the piston tops.

Valve train organiser tray is a good way to keep things in the right order.

Heads and sump removed. You can see the oil pump and pickup.

Engine flipped over. No 4 bolt main here - two bolt only.