After some consultation with other builders, putting the engine on as an assembly with the mount attached to it is technique I'm going to use.
The starter is going to poke through the firewall, so all sorts of misadventures were at hand. I had thought to mount it with the selenoid on top, as it looks cleaner to me and kept the footprint of the engine. So I made this great template of cardboard that used the holes on the mount and told me exactly where to make the hole. Then I checked it against the firewall, and the cross brace for the fuselage intersects. Since that's Station One (or is it zero?), starting and setting the square for the front of the fuselage, there's no monkeying around with that tube.
So the selenoid has to go on bottom, which meant a new template. And confirming its measurements. The hole is cut - if I did everything right after I mount the engine the starter should go through it nicely and the bolts in without fuss. Oh, I'm leaving it off while mounting the engine; since it stands past the mount, playing Keep The Starter In The Hole And Don't Bang It Around seems like a funny story I'd rather not share later on.
Tomorrow's weather looks amiable - no rain (we don't mention that at 8 a.m. it's to be 78 degrees with 90% humidity and then thankfully gets warmer so I don't have to be bothered with the nuisance of mittens or a thick coat), so I plan on mounting the engine.
First, though, the engine had to come out of the crate and onto a dolly for transport into the back yard.
Now, then, in the crate the engine sits on a wooden cradle and is held in place with some retaining straps that are screwed into the floor of the crate. My plan was to lift the engine off of the cradle with my shop crane, pull it up, and place it on the dolly.
Except the cradle sits on a bit of plywood that is set on the floor of the crate. The cradle is screwed onto this, and the plywood is screwed down with lots and lots of wood screws.
So lower the engine back down and get to work with a drill and bit to take them all out.
Then lift the engine, put the cradle and the board on the dolly, move the crate out of the way, and then lower the engine back onto the cradle.
The last bit was sort of adventurous, as my ropes weren't quite evenly tight and there was some stretch, giving the prime mover a decided tilt to one side.
But she's ready for transport and mounting!