The platform is probably either Sailcraft of Canada or Panthercraft. Of the two, I always heard the Sailcraft boats were built better. The early boats were pretty wiggly (not very stiff) and the beam sizes were quite small in comparison to what is used on a Marstrom platform today. If the boat has little use and has been stored properly, it may be worth putting back together for some nostalgic sailing but I would not recommend trying to upgrade it to the new rig.

Bob Hodges
ex-Tornado USA 796
A-Class USA 230