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. |
Books about Cadillac |
History of LaSalle |
Books on other automobiles |
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1963 |
1964 |
1965 |
1967 |
1968 |
1969 |
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