It lives!
I fired up my CL350K3 yesterday for the first since rebuilding the top end, carbs, etc, etc.
First time it's run since I brought it home in 2016.
It sounded pretty good too for having just slapped in the old points plate and guesstimating the timing.
No carb leaks, top end sounded good, all-in-all a successful test fire.
Now for the finishing touches.