Early A fan Shroud

66340SEDAN said
My dads 1966 Formula S has one from the factory, 273 4bbl, 4-speed with the performance suspension package, non a/c and no towing stuff.

Since I have only 65 factory literature and manuals, I can't speak for the 66 models. A 66 Dealer album or parts catalog might be able to shed some additional info and/or availability on these shrouds. They don't seem to be all that common.