I did it, I went out and bought a nasty almost totally stripped blaster frame and will be using it to house the extra 200gy engine I have here.
Virtually nothing will get done on it until the weather breaks but I may get some things for it in the meantime.
Front wheels/tires(so I can roll it out of my way)
gas tank (needed to get engine clearance right)
swingarm bearings/bushings+bolt
handlebars & clamps/bolts
It's rough but I'll have no fear in cutting into it.
I think the blasters came with a 520 chain so I'll have to switch over to that and the exhaust will be a concern but the electrical and air filter and making engine mounts will be somewhat easy.
No the engine does NOT just slip in right now