My engine arrived!
After work, I wasted no time stripping the engine. It weighed 38.4lbs before losing the fuel tank, muffler and air cleaner.
I had installed a flat aluminum plate in the bike's midframe, to trial-fit my "V-twin" engine project. This plate rises over 4.75" above the bottom bracket's shaft.
Using that same plate's location to mount this monstrous engine, the Sixthreezero's midframe SWALLOWED the 212cc engine, and it sits LEVEL!
There is 5.5" clearance from engine base to seat tube, 2.5" from valve cover to seat tube and almost 2" from valve cover to top tube. There's 5" from the gas tank's mounting horn to the top tube.
The left pedal arm clears the engine, but the right side hits sheet metal. I'll either have to jockey the engine around or find a shorter arm.
It seems like this bike was designed to accomodate the 212 engine's length(12") and height(8.75" @ the "horns").
We'll see about engine width, when I hook up the clutch.
There's LOTS of room to install an SBP jackshaft and pulleys.
Or maybe I'll move all spinning parts to the front of the engine, for more legroom.
What a relief.
The 212cc engine fits very well in the Sixthreezero's "In the Barrel" extended cruiser.
It's late; I'll take pics tomorrow.