Never really understood why all motors aren't horizontally split. Helped another barfer a few months back split the cases of an RD350. Talk about painless....
The torch method really isn't difficult, especially as you have experience building motors, even if some years back. For the less experienced folks who are a bit overwhelmed with it all, it certainly takes a bit of angst out of the process.
I'm sure if you took the bolt that holds the primary gear on down to the hardware store you could find another longer one with the same pitch. Be fairly straight forward pulling that side on with a longer bolt, a nut, washer, and a piece or two of scrap wood.
Not sure about the CR's crank on the other side. It has a nut to hold on the flywheel. A puller could be fashioned using that nut, albeit with a bit more work than the other side.
A lot cranks are hollow with a thread on that side too (stator side), even if not used for anything. If so, figure out the pitch, get a long bolt to fit and repeat process like primary drive side. Never done it, but seems very doable.
But have to figure out what your time is worth. After figuring out pitches, travel to store, fashioning your scrap wood.... might be time to just buy one. Then again, there's satisfaction to be had with home solutions. :laughing
The crank fit on the main bearing isn't all that crazy tight. They really do just fall in after being frozen and the main bearing heated. Not an exaggeration.
Its as easy as putting new bearings into cases. As long as the parts are properly frozen and enough heat is used. The problems most folk encounter is they haven't properly deep freezed the part and or not added enough heat.
But always welcome to ride up with the engine and do on my bench too. Good luck. :thumbup