If you are going to lift it out with the boom, you may want to attach a spare halyard around the boom at the lift point - this can avoid putting a lot of bending moment in the boom when the engine is hanging, and you can use it to get more height if you need it.
Definitely strip the engine, not just for weight but for clearance - a swinging engine can do a lot of damage to your undoubtedly beautifully finished companionway!
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345 "FastForward"