The New Horizons were built by Ray Greene in Ohio I believe. Ray Greene was a real pioneer in fiberglass construction building a pretty diverse
line of fiberglass boats that included the Rebel on up to the New Horizon. I believe that the New Horizon was a Sparkman and Stevens design closely a kin to the Tartan 27 keel centerboard boat.
Like many boats of this era the New Horizons were a mixed bag. Originally intended as MORC race bosts they had pretty wholesome
lines. They were reasonably roomy down below for that era. They were pretty good upwind with the centerboard down and pretty good dead downwind with the board raised. By today''s standards they would be dead slow and miserable in light air.
Construction was not the best but it was not awful either. Like many boats of this era the engineering was not that good and the extra weight adds stresses but does little for adding strength.
Obviously the standing and running rigging if original is completely shot. Sails if they have not been replaced several times over the years are long past useful. Otherwise there could be a lot of work and expense putting the old girl back in shape and of course your friend will have a bit of antique when you are done.
Good luck
Jeff