Apparently I'm a poor judge of "glitter" in oil - because the engine is fine! WHEW. So lucky.
Thankfully I have all winter to freshen it up and reassemble. I will also fab a new water thank that will fit around a shock, and try again next year.
One thing I did notice - the cam chain guide on the top end, over the sprockets had snapped around one bolt. It was still in place and tight, but looked like it fatigued and cracked under stress. Has anyone seen this before?
Dean