Just read and enjoyed your blog. I applaud your dedication to the brand. It's a bummer that you didn't make it to The Vintage as planned, I'm sure you were very disappointed. For sure next year!
I recently picked up the little green 318ic and since it is going to be a daily driver, and I want to avoid EXACTLY what you just went through, I tore down the entire motor and refreshed it. I won't get too cocky though, I'm sure some other gremlin will come out to bite me.
Hopefully that new water pump solved the problem? Updates please!
Disregard, I see the other threads now.