Take off all the stuff that is not engine.
Struggle (unsuccesfully) to lift the greasy, pointy, heavy engine out of the frame.
Realize it would be easier to remove if the oil filter housing were off.
Round off the oil filter housing bolt.
Cut through the left side frame tubes with a Sawzall. Support the engine properly so it does not fall. It takes about 3 sec. to cut through the frame-no kidding.
Toss the frame tube in the trash.
Place the engine in the corner of Joe's garage.
That's all there is to it.
I should get a job working for Clymer.