Bill, I can't supply the stock dimensions, but would strongly suggest that you not trust them when ordering a mainsail
for a boat
that old. In thirty odd years, previous owners can make the most astonishing alterations in things, and even respected builders like Cal
sometimes make changes as the model matures.
All legitimate sailmakers will come to your boat
and make the needed measurements in situ. To do otherwise begs for an ill-fitting mainsail.