The twin posh "Flagships of the Cadillac fleet" carried styling alterations similar to the "lesser" Fleetwoods. New electronic leveling control was standard. Six-way power driver's seat controls were now in the door armrest. Standard limos sat eight. The seven-passenger Formal Limousine had a standard divided 45/45 front seat with black leather seating, plus a sliding glass partition. Both models had two additional fold-down seats. Florentine velour upholstery was offered in light gray, black, or dark blue. The Automatic Climate Control System could be operated by driver or passengers. A Dual Accessory Control Panel also let passengers operate the power windows -- a logical decision, to be sure. A padded Elk Grain vinyl roof was standard. Not quite as many Formal limos were built as the standard variety. Chrome landau bars were available by special order. So were a full landau roof or cabriolet roof, both in padded Elk Grain vinyl. The landau option offered closed-in rear quarters and a smaller back window. as well as opera lamps.
| Model No. | Style Number | Body Type | Seating | Factory Price | Shipping Weight | Production Total |
|---|---|---|---|---|---|---|
| 6D | F23 | 4-door Sedan | 8 | $19,642 | 4772 | 848 |
| 6D | F33 | 4-door Formal Limousine | 7 | $20,363 | 4858 | 682 |
| 6D | Z90 | Commercial Chassis | - | N/A | N/A | 852 |
| Feature | Base engine | Optional diesel engine |
| Type | 90-degree, overhead valve V-8. Cast iron block and head | |
| Displacement | 425 cu. in. (7.0 liters) | 350 cu. in. (5.7 liters) |
| Bore & stroke | 4.082 x 4.06 in. | 4.057 x 3.385 in. |
| Compression ratio | 8.2:1 | 22.5:1 |
| Brake horsepower | 180 @ 4000 rpm | 120 @ 3600 rpm |
| Torque | 320 lbs.-ft. @ 2000 rpm | 220 lbs.-ft. @ 1600 rpm |
| Main bearings | Five | |
| Valve lifters | Hydraulic | |
| Fuel supply | 4 Bbl. carburetor | Electronic fuel injection |
| VIN Code | S | N |
| Feature | Limousine |
| Wheelbase | 144.5" |
| Overall length | 244.2" |
| Height | 56.9" |
| Width | 74.6" |
| Front Tread | 61.7" |
| Rear Tread | 60.7" |
| Standard tires | HR78 x 15-D wide WSW |
| Transmission | Turbo Hydra-matic transmission standard on all models; column shift. |
| Gear ratios | (1st) 2.48:1: (2nd) 1.48:1; (3rd) 1.00:1; (Rev) 2.07:1. |
| Limo Standard axle ratio | 3.08:1 |
| Rear Axle | Hypoid rear axle |
| Steering | variable-ratio, power assisted |
| Front suspension | independent coil spring, link-type stabilizer |
| Rear Suspension | four-link drive, coil springs |
| Limo Brakes | front disc, rear drum |
| Ignition | HEI electronic ignition. |
| Fuel tank | 25.3 gal. |