Steel fan shroud
 

64 uses the small tapered & upper hose shroud , what would the larger tapered one be for 66/67 ?

64 fan shroud
 

you can look on the ames/performance years catalog and see the difference originals are metal they have exact copies that are plastic...

Underestood as they list 64-67 the same but are not . i am aware of the 2 different heights . Just wanting to identify the one in my picture that is not tapered as much as the other one. I am thinking 63/64 fullsize blue picture . 64/65 red picture.

Yes the blue picture does look like the 61-62 big car. The 61-62 had the bolting flange at about 2 inches wide each side. 63-64 were only about 1 inch wide each side. Those two can be interchanged with a bit of good metal work to either widen or narrow as needed.