Story
For 1966, Pontiac made the 2+2 its own full-size Series 254 rather than carrying it as an option on a Catalina. The two bodies were the 25437 pillarless hardtop and 25467 convertible. Both combined Pontiac's long-wheelbase full-size chassis with a standard 421 four-barrel, dual exhaust, floor-shifted three-speed, bucket-seat cabin, and model-specific exterior trim.
The standard 421 produced 338 gross horsepower and 459 lb-ft. Buyers could order the 356-hp Tri-Power version or the 376-hp 421 HO, which paired three Rochester two-barrels with its own camshaft, valve springs, exhaust and cooling equipment. All three are configurations of the same 1966 2+2 model and belong on this page rather than separate near-duplicate pages.
The standard manual was a fully synchronized three-speed with a Hurst floor shifter and 3.42 axle. Wide- and close-ratio four-speeds and Turbo Hydra-Matic were optional; the automatic's standard axle was 3.23, while air conditioning could change the specified ratio. Safe-T-Track was extra. The 121-inch-wheelbase chassis used independent front control arms, a four-link coil-spring live rear axle, and 11-inch self-adjusting drums. Pontiac's aluminum eight-lug hub-and-drum equipment remained optional.
The 2+2's visual identifiers included 421 and 2+2 emblems, vertical slots behind the doors, pinstriping, full wheel discs, and the 1966 twin-lens taillamp treatment. Inside were Strato bucket seats, full carpeting, special door trim, and all-Morrokide upholstery offered in four brochure color families. A console, gauges, tachometer, clock, and vacuum gauge were order-dependent equipment rather than universal identifiers.
Pontiac built 6,383 2+2s for 1966: 2,208 with synchromesh transmissions and 4,175 with Hydra-Matic. The reviewed records do not provide a reliable hardtop-versus-convertible or engine-configuration split. Authentication starts with a 25437 or 25467 identity and the individual PHS invoice or billing history, then checks the engine, induction, transmission, axle, paint, trim, and component dates. Badges, vertical slots, buckets, or a 421 help inspect a car, but none substitutes for its records.