I restored a 1966 Glasspar this fall. Gutted the floor and transome. We used 3/4 inch walnut for the stringers and 1/2 inch treated (not marine) plywood for the floors. We used fiberglass mesh and epoxy to attach the stringers to the hull. That stuff is tougher than concrete. I will try to post a link to the pictures. This is my first official post/reply on iboat. I own 2 classic Glasspars. One I am restoring and the other that is in excellent shape. Good luck with the restoration.just bought 60 claspar pulled carpert up plywoood on deck is rotton i have removed it and patched holes in
bottom of boat how do you secure ply wood to haul before you put fiberglass down