Cadillac would drop air suspension after this year. The system was troublesome, hard to repair, and the cost discouraged most buyers.

Cadillac Series 6300:  Models in the DeVille sub-series were trimmed much like 6200s. but there was no bar medallion on the front fenders and special script DeVille nameplates appeared on the rear fenders. Standard equipment included all base model features plus power windows and Two-Way power seat. Interiors were done in Chadwick cloth or optional Cambray cloth and leather combinations.

Eldorado and Eldorado Brougham:  External variations on the Seville two-door hardtop and Biarritz convertible coupe was in bright body sill highlights that extended across the lower edge of fender skirts and “Eldorado” lettering on the sides of front fenders just behind the headlamps.

Standard equipment was the same as on 6300 models plus: heater, fog lamps, Eldorado engine: remote con­trol trunk lock, radio with antenna and rear speaker: power vent windows, Six-Way power seat, air suspension, electric door locks, license frames and five whitewall tires. A textured vinyl fabric top was offered on the Eldorado Seville and interior trim choice included cloth and leather combinations.

The Brougham continued as an Italian-bodied four-door hardtop with special “Brougham” nameplates above the grille. This model did not have “Eldorado” on front fenders or body sill highlights, but had a distinctive squared-off roof line with rear ventipanes – a precursor to 1961 styling motifs for the entire Cadillac line. A fin-like crease, called a “skeg”, ran from behind the front wheel opening to the rear of the car on the extreme lower body sides. There were special vertical crest medallions on the trailing edge of rear fenders. Cruise Control, a Guide-Matic headlight dimmer, air conditioning and E-Z-Eye glass were standard equipment.

Series 60 Special:  The Sixty Special Fleetwood sedan had the same standard equipment as the 6200 convertible and all 6300 models. This car was  distinguished by “Fleetwood” in script on the rear deck, nine vertical bright metal louvers on rear fenders, vertical crest medallions on front fenders and wide full-length bright metal sill underscores which extended to the fender skirts and lower rear quarter panels.

Series 75 Fleetwood: The long wheelbase sedan and limousine had auxiliary jump seats, high-headroom roof line, formal six-window styling, broad ribbed roof edge beauty panels and trim similar to 6200 Cadillacs. The limousine passenger compartment was trimmed in either Bradford cloth or Bedford cloth, both in combinations with wool. Florentine leather upholstery was used in the chauffeur’s compartment.

Standard equipment included all items found on the Sixty Special Fleetwood line.

Eldorado V-8:  Overhead valves. Cast Iron Block. Five main bearings. 
Displacement: 390 CID.
Bore and stroke: 4.00″ x 3.875″.
Compression ratio: 10.5:1.
Horsepower: 345 @ 4800 RPM.
Torque: 405 @ 3400 RPM.
Valve lifters: Hydraulic.
Camshaft timing: Intake 324° (274°), Exhaust 324° (274°), Overlap 98° (48°), Lift (Intake) 0.451″ (Exhaust) 0.451″. 
Carburetors: Three Rochester 2GC two-barrels, (front) model  7013033, (center) 7013034, (center w/air conditioning 7013037 (rear) model 7013035.

NOTE 1: This engine was available as an option in all lines except Series 75.

NOTE 2: Regarding advertised camshaft duration, Cadillac counted the hydraulic lifter “ramp” which allowed the lifter to fill with fluid, but did not appreciably lift the valve. The more accurate duration was at about 50 degrees of camshaft rotation – hence the true duration is shown in parenthesis.