Rear wheel trim 65 Catalina
 

Does the rear wheel well trim for a 66 full sized wagon fit a 65 Catalina hardtop? Thanks.

Not absolutely sure. However, fender skirts from 65-66 will interchange so the shape of the opening must be the same.

Going by the parts book, only the front lower pieces are the same, GM part #'s 9780148 and 9780149 for 65 Cat 2 drs and 66 Bonn wagons.