Are the boxes watertight? I have a 95 Suncruiser and they have a plastic liner of types in them but it has vent holes part way up for things to dry out if they get wet. I guess that It would not hurt anything .
I don't think that would be a problem. Just remember that it you plan on using it as a watertight compartment. The hols that I have in mine are about eight inches up so I still have somewhat of a watertight compartment.