First time I've ever tried this. Wanted to add some pics I looked for before I started this. I'm confident I'll miss some details.
This is what I started with (350) covered in dried oil (1/2" in some places).
This is the motor replacing it, (motors and more 325, (bored out 295)
First I removed the battery, airbox, carb, wires, gas line, rubber drain line to the case, coil, starter bolt, belts, exhaust manifold, and linkage rods.