I lived with the Atomic Bomb for 17 years with 4k miles of cruising too. If you can change a tire. Then you can pull the bomb out of the boat.
Mark, and realease the wiring
harness. Remove the transmission after releasing the shaft. Use the main halyard to hold up the boom over the
hatch, and then attatch a block, and tackle to the same point. Guide the motor up off the mounts at it is lifted off the mounts. Pull the motor up all the wayover the companionway, and swing it out over the dock to the waiting dock cart. 2 hours tops in work, and add an hour for thinking.
Buy a used motor that starts for $1k +or-. Have it rebuilt completely for under $4k. All these other prices are insane. They are asking for $3k, or more for 4-6 hours in work. I had my motor rebuilt for $3.5k new crank, and all.
If you go with the bomb again. All you have to do is make sure the blower is working everytime, and open the steps to check before starting. It's a great motor. Tune-up parts are a/c delco, and cheap. Don't get tune-up parts from a marine store. These motors are also put in the tens of thousands of forklifts, and go by the name of Universal......Let us know how it goes......BEST WISHES....i2f