Fleetwood Cadillac History 1978

Fleetwood Cadillac Models & History 1978

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.


Heavy-duty cooling system $41
80-amp alternator $51
Engine block heater $20
California emission equipment $75
Limited slip differential $67
High altitude pkg. $33


Cruise control $122
Controlled-cycle wipers $32
Rear defogger, grid-type $94
Six-way Dual Comfort power passenger seat adjuster $118-$150
Power 50/50 seat recliner $116
Power 50/50 passenger seat recliner $210-$262
Tilt/telescope steering wheel $121
Automatic door locks $114
Illuminated entry system $59
Fuel monitor $29
Theft deterrent system $130
Trunk lid release and power pull-down $80
Twilight Sentinel $54
Guidematic headlamp control $62
Trumpet horn $21
Remote-control right mirror $34
Lighted thermometer on left mirror $27
Lighted vanity mirror, passenger $50
AM/FM stereo radio with digital display; $106
AM/FM stereo radio with digital display w/tape player $106
AM/FM stereo radio with digital display w/CB $281
AM/FM stereo radio with digital display w/tape and CB $427
Seek/scan AM/FM stereo radio w/rear control for Limo $203
Firemist paint $163
Front bumper reinforcement $9
Door edge guards $11-$18
License frame each: $9
Leather seating area $295-$315
Carpeted rubber front floor mats $31-$34); rear: $15-$21
Trunk mat $12
Turbine-vaned wheel covers $54
Locking wire wheels $541-$595
Locking wire wheel covers $179-$233
Stowaway spare tire for limo No Charge