PROGRESS UPDATE
Thanks, Brent and Arnold, for the advisement. I've determined that I need to make new seal compression plates, and am waiting for some brass sheet stock to make them out of. I'll continue with the sight glass progress when it arrives.
In the meantime, I've disassembled the engine portion, and am giving the parts a good cleaning and inspection. Many of the plated parts are still in nice condition, having just been lurking beneath a coating of hardened oil residue, and other assorted nasties.
Here's a layout of the cleaned up parts and pieces:
[ Guests cannot view attachments ]
I've decided to make a new crankshaft for this engine. I previously mentioned that the crankshaft bearings seemed to have a great deal of excess clearance. Disassembly of the engine revealed a major contributing factor as to why. More about this when I get to the point of making the new shaft.
Meanwhile, back to cleaning...