Here is another shot of the scissor jack. I collapsed it entirely and slid it in through the transmission opening in the bulkhead. You need to be careful and use mirrors to make sure you are not jacking on the oil pan or any sending units, hoses or fragile brackets. Oil pans can be used on small engines but I would advise using a block of wood to spread the load. If your oil pan is rusty please do not use it or you may punch through. If possible always use the mount or another strongly supported area of the engine.
Lifting one corner of an engine is not a lot of weight. The weight is so little that I can usually twist the jack screw by hand with no extensions or tools. With the other mounts loose it is very easy to lift one out. If you can get a good jacking angle and find enough support you can lift in the center and raise the front or rear and do two front or rear mounts at the same time.