So my 1915 dropped a valve which ended it's short 20,000 mile life. Fortunately the case was not damaged.
I had it rebuilt as a 2180, using thick wall 92 mm cylinders. I put a Web 228/119 cam in it, Panchito 044 heads, went full flow, moved the oil filter to a more convenient location and put the oil cooler up front.
While I had it out, I installed one of those new Vintage Speed Inox 356 oil fillers, put in a new alternator and painted the inside of the engine compartment.
It now looks great and runs fantastic! I'm very happy with the increase in power and how the engine idles.