For its final outing, Calais displayed the same front-end look as the more expensive DeVille, with a Cadillac “V” and crest at the hood front. Interiors could be Morgan Plaid in four possible color combinations, or expanded vinyl in antique light buckskin or black. Standard features included
an AM/FM radio with automatic power antenna
automatic climate control
power door locks
Sedans had small coach windows on the rear pillar; coupes much larger, squarish rear quarter windows. Rear fenders held script nameplates. Electronic fuel injection had become optional on the 500 cu. in. V-8 in March 1975, but the carbureted version continued as standard.
4-door hardtop Sedan
Fuel Injected engine
V-8 90-degree, overhead valve V-8. Cast iron block and head.
500 cu. in. (8.2 liters)
Bore & stroke
4.300 x 4.304 in.
190 @ 3600 R.P.M.
215 @ 3600 R.P.M.
360 lb.-ft. @ 2000 R.P.M.
400 lb.-ft. @ 2000 R.P.M.
Hydraulic valve lifters
4 Bbl. Rochester M4ME
GR78 x 15-B SBR wide WSW
Three-speed Turbo Hydra-matic standard on all models; column shift (400 series)
(1st) 2.48:1; (2nd) 1.48:1; (3rd) 1.00:1: (Rev) 2.07:1 or 2.09:1.
Standard final drive axle ratio
Optional axle ratio
Hypoid rear axle
variable ratio power assisted
upper/lower control arms, coil springs, rod-and-link stabilizer bar
four-link drive, coil springs
separate body and perimeter frame
15 x 6 JK
front ventilated disc. rear drum with power booster