1966 Pontiac 2+2 421 H. O. Tri Power engine 376 horsepower with 4speed Muncie transmission and 3:42 posi-traction rear end. Equipment includes 8 lug wheels with red line tires, power steering, power brakes, factory air conditioning, tachometer, full gauge cluster, manifold vacuum gauge, AM/FM radio, winshield washer/wipers, tilt steering wheel, wood steering wheel, bucket seats, console, power antenna. Cameo Ivory paint and black interior w/ black vinyl top. Approximately 6,000 2+2’s were built in 1966, the only year the 2+2 was its own model. Only about 2000 like this one were built with 4 speed Muncie transmissions
The 421 badging was standard on the 2+2, the 421 H.O. Tri Power engine however was optional. Standard motor was the 421 4 barrel with 342 horsepower, which was no slouch itself. This was the last year for the 421 motor and for the Tri Power set ups, GM banned multiple carb setups after this model year except for Corvettes. In 1967 the 428cid engine replaced the venerable 421cid, it could be still had with 376 horsepower though. It was also the last year for the 2+2, which had reverted back to an option on the Catalina for 1967.