For 1958, Cadillac stood more or less pat on a winning hand. Styling
changes involved minor sheetmetal reshaping and ornamentation shuffling,
and all models acquired the new four-headlamp system, first seen at
Cadillac on the Brougham, in line with an industry trend. Eldorado
performance was substantially improved with the adoption of three
two-barrel carburetors, which boosted output to 335 bhp, 25 bhp up on the
single-four-barrel engine used elsewhere in the line. The Brougham's
astronomical price was unchanged, but the Seville 40 and Biarritz, which
consistently bore identical price tags, rose a startling $762. The timing of
such a substantial increase proved to be ill-advised in this deep recession
year and sales fell by more than half. The Brougham fared little better,
production stopping at a mere 304 units.
| Serial numbers now used a three symbol prefix. |
| The first pair of numerical symbols "58" designated model year. |
| A one-letter alphabetical code (included as part of model number in charts below) indicated model and series. |
| Each prefix was followed by the consecutive unit number which started at 000001 and up. |
| The serial number was located at the front of the lefthand frame side bar. |
| Motor serial numbers again matched and were found on the center lefthand side of the block above the oil pan. |
| Model Number | Body Style | Model | Seating | Factory Price | Shipping Weight | Production Total | |
|---|---|---|---|---|---|---|---|
| SERIES 62 ELDORADO SPECIAL | |||||||
| 58H-62 | 6237SDX | 2-door Coupe Seville
| 6 | 7500 | 4910 | 855 | |
| 58E-62 | 6267SX | 2-door Biarritz Convertible
| 6 | 7500 | 5070 | 815 | |
| 58-62 | 6267SSX | 2-door Special Eldorado Coupe | 6 | - | - | 1 | |
| SERIES 70 FLEETWOOD ELDORADO BROUGHAM | |||||||
| 58P-70 | 7059X | 4-door Hardtop Sedan
| 6 | 13,074 | 5,315 | 304 | |
NOTES:
| Type | V-8 Overhead valves |
| Block | Cast iron block |
| Displacement | 365 cubic inches. |
| Bore and stroke | 4.00 x 3.625 inches |
| Compression ratio | 10.25:1 |
| Brake horsepower | 355 at 4800 rpm |
| Bearings | Five main bearings |
| Valve Lifters | Hydraulic valve lifters |
| Carburetor | Three (3) Rochester two-barrel Model 7015801 |
The major change for the Eldorado Brougham was seen inside the car. The interior upper door panels were now
finished in leather instead of the metal finish used in 1957. New wheel covers also appeared. Forty-four trim
combinations were available, along with fifteen special monotone paint colors. This was the last year for
domestic production of the handbuilt Brougham at Cadillac's Detroit factory, as future manufacturing of the
special bodies was to be done by Pininfarina of Turin, Italy.
| Type | V-8 Overhead valves |
| Block | Cast iron block |
| Displacement | 365 cubic inches. |
| Bore and stroke | 4.00 x 3.625 inches |
| Compression ratio | 10.25:1 |
| Brake horsepower | 310 at 4800 rpm |
| Bearings | Five main bearings |
| Valve Lifters | Hydraulic valve lifters |
| Carburetor | Carter AFB four-barrel Model 2862S. |
| Model | Wheelbase | Overall Length | Front Tread | Rear Tread | Tires |
|---|---|---|---|---|---|
| Series 62 58H & 58E (Eldorado | 129.5 | 223.4" | 61" | 61" | 8.20 x 15 whitewall |
| Series 70 (Eldorado | 126" | 216.3 | 61" | 61" | 8.40 x 15 high-speed thin whitewall |
| Radio with antenna and rear speaker | $164 |
| Automatic heating system | $129 |
| Posture seat adjuster | $81 |
| Six-Way seat adjuster | $103 |
| Power window regulators | $108 |
| E-Z-Eye Glass | $46 |
| Fog lamps | $41 |
| Automatic headlamp beam control | $48 |
| Five (5) sabre spoke wheels | $350 |
| White sidewall 8.20 x 15 four-ply tires | $55 |
| Gold finish grille on Eldorado | no charge |
| Four-door door guards | $7 |
| Two-door door guards | $4 |
| Remote control trunk lock | $43 |
| License plate frame | $8 |
| Air conditioning | $474 |
| Air suspension | $214 |
| Electric door locks on coupes | $35 |
| Utility kit | $15 |
| Monogram | $12 |
| Blue Coral waxing | $25 |
| Undercoating | $5 |
| Lubrication agreement | $34 |
Five special Eldorado Biarritz convertibles were built with completely automatic top riser mechanisms and metal
tonneaus and incorporated humidity sensors which activated the top riser mechanism in case of rain. These cars
had four place bucket seating and custom leather interior trims including driveshaft tunnel coverings. The 1958
Eldorado Brougham is a certified Milestone Car.
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