It didn't tick today and even if it does, ticky is loose, not tight.
I have a commercial grade Mity Vac brake bleeder (which can be separated for vacuum testing) but I don't know how that would re-act with the engine.
I also have my Morgan carb tune and last time I synced (been awhile) all cylinders behaved about the same. Once the sync starts to go out, even a little, I get a vib thru the right side of the seat (quite annoying) but its been smooth and running like a top...
I'll order the shims and side cover gasket get to it if it keeps up.
It seems like it has to be pretty chilly outside for it to do it. This time of the year, down here, it ain't chilly!