class, but back then, they had ways of beating boat inspection. Vladimir Vanha, the crazy genius designer of Noah kayaks, used to bring a 12' 6" Magma to me with little fiberglass extensions tacked on to meet the required race length.
Kevlar was just being tried out in 1973. When you were doing repairs, did you find the outside cloth in the laminate fuzzy, or did it seem to sand smooth like glass? One thing people had to learn at the time was that Kevlar is a great inside cloth, but actually inferior to glass as an outside cloth.