Great work guys .
So he has 1 of 50 Convertibles as a basis - since all of those 455cid cars were Automatics.
Then a further reduction to 1 of 30 for T41 455cid Auto - all Bodystyles
Subtract the wagon makes 1 of 29
Subtract all 2doors with metal roofs (probably biggest percentage)
Subtract any token 4door freaks
Its probably down in the teens - or less , but that is theoretically guessing.
Each car is it's own entity and 21 of the 29 could be Verts for all we know.
1 of 30 ain't bad for a days work.