That probably carried through the 1966 model year, not sure. Maybe a 66 V-8 car got 14" but again only 4-1/2" wide. Also a disc brake option got 14" eheels to clear the calipers.
The biggest factory SBP wheel was 14" x 5-1/2", Formula S, GTS, HD suspension, Rallye wheels, etc. There never was...