---

Nice looking boat, and glad to see another one going to a caring home.

If the top of the tank is not up to the lip of the rear port drain you will get standing water and that will be a problem, largely from the moisture that will build up on the underside of the tank cover and eventually rot it out. I don't have a quick solution.

The crack at the front of the cover is not critical, assuming you fill it. Since you have the cover off you should let it dry out, then use something such as CPES (http://www.jamestowndistributors.com/userportal/show_product.do?pid=1268) before filling the holes. I used CPES on the entire underside of my cover where wood was exposed, particularly at the edges of the plywood laminate.

John K.