Long-wheelbaseCadillacs came in Fleetwood limousine or nine-passenger sedan configurations, both with auxiliary seats. Side trim was the same as on Series 62 models, except that no Cadillac crest was used on the rear fins.
1957 Cadillac Fleetwood
I. D. NUMBERS
Serial numbers and engine numbers were the same again.
on a boss on the front right-hand face of the engine block;
on the lubrication plate on the left front door pillar (1953-1957)
and on the right frame side member behind the motor support.
The first pair of symbols were “57” to designate the model year.
The next two symbols indicated series as follows:
“62” = Series 62 including Eldorado Specials
“60” = Series 60 Fleetwood
“70” = Series 70 Eldorado Brougham
“75” = Series 75 Fleetwood
The immediately following numbers, beginning at 00000 for each series, indicated the production sequence in consecutive order.
Ending numbers were the same for all series since the engines were installed in mixed production fashion.
NOTE: The commercial chassis featured a 3962mm wheelbase and was provided to professional car makers for construction of funeral cars and ambulances, etc.
SERIES 75 FLEETWOOD ENGINE
V-8, Overhead valves.
Cast iron block.
Bore and stroke
101.6mm x 92.1mm
300 hp @ 4800 rpm
224 kW @ 4800 rpm
Five main bearings.
Hydraulic valve lifters.
Rochester four-barrel Model 7015701.
Series 75 Fleetwood
8.20 x 15 six-ply blackwall
Standard dual exhausts
Hydra-Matic drive, power steering and power brakes were standard in all Cadillacs
Many models (designated by non-bracketed “X” suffix in charts above) also had standard power window lifts
Fore-and-Aft power seats were standard on the same models
Six-Way power seats were regularly featured on Eldorados and Sixty Specials
Air-conditioning, radios, heaters, etc. were optional on most other models (standard in Brougham) along with regular GM factory and dealer installed extras