Get some good zinc based paint to help with the rust prevention!!
Also you can put some plywood in the boat and put a engin hoist right in the boat, this is how I did the engin coupler when I needed to.
Speaking of make sure you look at all well when you have it out, Don't want to have to do it twice!! I had mine out for the pan, and 2 weeks kater I blew the engin coupler
I wish I could come by and help ya, but I am having some medical issues right now.
Good Luck!!