Buckmeister420,
Welcome to the Forums and good luck with the project.
Do you have covered storage for this RV? If so, the roof condition probably isn't too important at this point. But if not, I would seriously consider making sure the roof was solid and water tight to prevent any water damage (or any further water damage) if there are leaks. I'm guessing that if the rig just sat, and no one has tended to roof in quite some time, there could be issues.
I know you're focused on the engine, but in my opinion, the roof condition and any water leaks would be the FIRST thing I'd be concerned about.
Again, Welcome and Good Luck!
~Rick
