Thanks for the replies so far. This is all helping a lot. Is it safe to use 1/2" for the new sole and probably replacing the stringers in the floor? How many coats of epoxy would I use on the new sole? Also when placing the new wood sole in the boat, would I want to use fiberglass tape along the edge again or would a good bead of fast cure 5200 be sufficient.
Some info: the boat won't be spending long periods in the water or even uncovered. Also I bought it for just a few hundred dollars and its about 40 years old, so I'm willing to do work that has potential to backfire at least for the learning experience.