Could be a French to English issue here.
A radiator fan shroud was one of the many components included in the air conditioning option. So not a stand alone option, but technically part of an option.
Since his car does not have A/C that eliminates that viarable.
Other than A/C, are there other options that would have resulted in inclusion of a shroud, for example the often seen "desert cooling" moniker? I don't recall seeing something like that on the option list, but then again have not gone looking for it either.
To try to complete the picture, did all Shelby's get a fan shroud, presumably for cooling purposes since they were marketed as a performance vehicle (that might need a help in the cooling department)?