If only I had been able purchase NOS convertible quarter panels! Instead, I bought what was available: two coupe quarter panels (from Burt Neuner in Chicago, as mentioned previously).
Since the profile around the top is different for a convertible, Brian had to splice the appropriate sections from the original convertible quarters. (Shown at left is the right quarter.)
Fortunately Brian is a master of such work and the original panels were undamaged in this area.