I'm thinking roof only for those raining track days 
ah I've got a tarp just for that purpose! Oh and drain holes in the floor.

TopGun - its not too bad at all to build - probably easier than a ground up restoration (no rust to deal with). Mine has taken a long time since I've got three little kids, we keep moving and its currently at my sister in law's house (making a tow bar to move home soon).