Desirable to Charley, it would appear. Kind of like odd colors or other weird option combos, it would appeal to seasoned collectors who have already had a Marina Blue 4sp SS and want to venture off the beaten path a little. Someone like... Charley
FWIW, If it was a "keeper", I'd restore it with the 3 on the tree too. If I knew I had to flip it before too long, I suppose the 4sp would get the nod. Either way, it will be a neat car when its done.