John
It's a long time since I owned Tulena 22 no 154, but I had a well mounted outboard, in a well formed by a previous owner. This left 2 small lockers each side of the well.
By cutting away some of the bulkhead on the starboard side I was able to locate the engine with the prop end inside the starboard locker and the head end resting on the port locker.
The tiller moved freely over the engine and a plug fitted in the hull hole.
A a 'sailing' day the engine stayed where it was.
I still see Tulena and she usually lays up at Thornham Marina if you want to look, I don't think it has been further modified.
Re drying out without legs, it's no problem unless you want to sleep on board. The heel is uncomfortable.If you dry anywhere with about 6-9" of softish mid the 22 will sit upright.
Philip