If you have a lift, it's not bad at all. It comes out nicely as a unit from the bottom. Drop the whole subframe out to the ball joints as a whole unit too. Really not that bad.
If you try to pull it from the top, it is harder. If you have a known good unit, and a lift, I would just pick a day and bang it out.
Slippery slope though, you may want to do some maintenance items on the donor engine while it is exposed!