Hi Shaen, if you have access to a crane it would be easier to lift
out the engines ,at least because of the tilt angle sometimes needed to lift
out with the propeller
shaft still in place. Ideally, replace all the seals
on the Saildrives while they’re out on the bench. Pay close attention to the condition of the fiberglass
surface that the diaphragms contact and that the threads are in good condition. The heat exchangers are easy to remove and strip down on the bench, less so in the boat
and again, make sure the end cap threads are in good condition. If not, helicoil them and they’ll last forever. Use a new metal retaining clip on the inner diagphragm if the old ones are even slightly suspect.
Also inspect the condition of the drive plate that’s attached to the flywheel, if the springs are loose or broken get new plates.
There are numerous video’s of Saildrive removal
on the usual channels....