Cadillac Models & History  1966


For 1966 Cadillac offered 12 models in three series, Calais, DeVille, and Fleetwood. Cadillac “firsts” seen this season included variable ratio steering and optional front seats with carbon cloth heating pads built into cushions and seatbacks. Comfort and convenience innovations were head rests, reclining seats and an AM/FM stereo system. Engineering improvements made to the perimeter frame increased ride and ease of handling. Newly designed piston and oil rings were adoped and new engine and body mountings were employed. All models, except the 75 Series limousines, were mildly facelifted. Changes included a somewhat coarser mesh for the radiator grille insert, which was now divided by a thick, bright metal horizontal center bar housing rectangular parking lamps at its outer ends. A Cadillac crest and V-shaped molding trimmed the hood of Calais. Separate, rectangular side marker lamps replaced the integral grille extension designs. There was generally less chrome on all Cadillac models this year.


Model Number Style Number Body Type Seating Factory Price Shipping Weight Production Total
66-682 68269-K 4-door Sedan 6 5171 4460 4,575
66-682 68239-N 4-door Hardtop Sedan 6 5171 4465 13,025
66-682 68257-G 2-door Hardtop Coupe 6 4986 4390 11,080


Type V-8 Overhead valves
Block Cast iron block
Displacement 429 cubic inches
Bore and stroke 4.13 x 4.00 inches
Compression ratio 10.5:1
Brake horsepower 340 @ 4600 rpm
Bearings Five main bearings
Valve Lifters Hydraulic valve lifters
Carburetor Rochester four-barrel type, model 7026030


Wheelbase 129.5 inches.
Overall length 224.2 inches.
Front tread 62.5 inches.
Rear tread 62.5 inches.
Automatic level control standard where indicated in text.
A new engine mounting system and patented quiet exhaust were used.
Tires 8.00 x 15.


Air conditioner $495.
Controlled differential $54.
Cruise Control $97.
Door guards on two-door models $4
Door guards on four-door models $7.
Soft Ray tinted glass $52.
Delete-option heater and defroster $97 credit.
License plate frame $6.
The new seat warmer $60.20
Power door locks on four-door hardtop models $70.
Power headlight control $51.
Six-way power front seat on four-door hardtop models $113
Head rests $40.15
Power window regulators on four-door hardtop models $119.
Power vent window regulator option $73.
Radio with rear speaker $165.
Radio with rear speaker and remote control $246.
AM/FM radio $191.
Rear seat belts $18.
Front seat belt delete-option $17 credit.
Adjustable steering wheel $91.
Remote control trunk lock $53.
Twilight Sentinel $57.
Five white sidewall tires 9.00 x 15 size with four-ply construction $57 exchange.