OK...here's pics of the welded up case (now you have an idea how tiny the flywheel is!), shaft extension, and approximate location of the outside pillowblock. After the welding was done, I ran into a little trouble with the shifting sticking. The line bore for the intermediate arm is a little off, so I'm hand working the bore (in the outer case) to get it working. It's close, now, but I got tired about 10:PM and quit.
I'm planning to anchor the pillow block to the engine, only, and not the frame (using 3 of the original rear engine mounts and a fork to the main case bolts on the sprocket side of the engine. I still have to make a seal cup to fit inside the case (it'll be a simple bolt on).
Regards, JimL