C1 - 1953-1962
C2 - 1963-1967
C3 - 1968-19821974 Corvette
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The transition to 'soft bumpers was completed in 1974 with the new body-color rear bumpers. The urethane plastic skin had built-in recesses for the license plate and taillights and a vertical center seam. The skin covered an aluminum impact bar mounted on two telescopic brackets. These were the last Corvettes without catalytic converters and the last year for the 454-cid engine with the RPO changing from LS5 to LS4. All 454 engines have orange painted rocker arm covers. Fuel requirement was 91-octane leaded or low-led regular. Shoulder belts were integrated with lap belts. The locking mechanism was changed from a pull-rate type to a swinging-weight type activated by the car's deceleration. The inside rearview mirror increased in width to ten inches.
1974 total Corvettes built - 37,502
1974 Coupes - 32,028
1974 Convertibles - 5,474
| Serial Numbers | |
| Corvette | 1Zx7y4S400001-1Zx7y4S437502 |
| Coupe is body style 37 and convertible is body
style 67 in "x" position Engine code is either "J" for the base 350-cid engine, "T" for the RPO L82 350-cid engine, and "Z" for 454-cid engine in "y" position. |
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Engine Identification
| Position | Character(s) | Description |
| 1 | V or T | Flint, MI. or Tonawanda, N.Y. engine assembly plant |
| 2 to 5 | 1025 | Engine assembly date (month/day) |
| 6 and 7 | Code | CLD - 350-cid 250-hp, automatic transmission CLH - 350-cid 250-hp, automatic transmission, California emissions CLR - 350-cid 250-hp, manual transmission CLS - 350-cid 250-hp, manual transmission, California emissions |
| All engines were equipped with a single 4-bbl
carburetor. Data are from GM's own Information Kit and some engines may or may not have made production. |
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Engine Specifications - 350 engines
| Item | Base | RPO L82 |
| Displacement | 350 cid | 350 cid |
| Bore & Stroke | 4.00" x 3.48" | 4.00" x 3.48" |
| Compression Ratio | 8.5:1 | 9.0:1 |
| Advertised Horsepower | 195 hp @ 4400 rpm | 250 hp @ 5200 |
| Torque | 275 lb-ft @ 2800 rpm | 285 Lb-ft @ 4000 |
| Valve lifter type | Hydraulic | Hydraulic |
| Fuel system | Rochester 4-bbl 7044207 - Manual * 7044206 - Automatic * |
Rochester 4-bbl 7044211 - Manual 7044210 - Automatic |
| * For California applications the fifth digit is "5." | ||
Engine Specifications - 454 engine
| Item | RPO LS4 |
| Displacement | 454 cid |
| Bore & Stroke | 4.251" x 4.00" |
| Compression Ratio | 8.25:1 |
| Advertised Horsepower | 270 hp @ 4400 rpm |
| Torque | 380 lb-ft @ 2800 rpm |
| Valve lifter type | Hydraulic |
| Fuel System | Rochester 4-bbl 7044221 - Manual 7044205 - Automatic * |
| * For California applications the fifth digit is "5." |
Regular Production Options
| RPO | Description | Cost | Units | % (1) |
| 1YZ37 | Coupe | $6,001.50 | 32,028 | 85.4 |
| 1YZ67 | Convertible | $5,765.50 | 5,474 | 14.6 |
| *** | Custom interior trim | $154.00 | 19,959 | 53.2 |
| A31 | Power windows | $86.00 | 23,940 | 63.8 |
| A85 | Custom shoulder belts (standard with the coupe) (1) | $41.00 | 618 | 11.3 |
| C07 | Auxiliary hardtop (convertible only) (1) | $267.00 | 2,612 | 47.7 |
| C08 | Soft trim roof cover for auxiliary hardtop (1) | $329.00 | 367 | 14.5 |
| C50 | Rear window defroster | $43.00 | 9,322 | 24.9 |
| C60 | Air conditioning | $467.00 | 29,397 | 78.4 |
| FE7 | Gymkhana suspension | $7.00 | 1,905 | 5.1 |
| --- | Optional rear axle | $12.00 | 1,219 | 3.3 |
| J50 | Power brakes | $49.00 | 33,306 | 88.8 |
| LS4 | 454-cid, 270-hp | $250.00 | 3,494 | 9.3 |
| L82 | 350-cid, 250-hp | $299.00 | 6,690 | 17.8 |
| M21 | Close ratio 4-speed transmission (2) | $0.00 | 3,494 | 9.3 |
| M40 | Turbo Hydra-Matic 3-speed automatic transmission (2) | $0.00 | 25,146 | 67.1 |
| N37 | Tilt-telescopic steering column | $82.00 | 27,700 | 73.9 |
| N41 | Power steering | $117.00 | 35,944 | 95.8 |
| QRM | GR70 x 15 white stripe belted tires | $32.00 | 9,140 | 24.4 |
| QRZ | GR70 x 15 white letter belted tired | $45.00 | 24,102 | 64.3 |
| U05 | Dual horns | $4.00 | 5,258 | 14.0 |
| U58 | AM/FM stereo radio | $276.00 | 19,581 | 52.2 |
| U69 | AM/FM radio | $173.00 | 17,374 | 46.3 |
| UA1 | Heavy duty battery (standard with 454-cid engine) | $15.00 | 9,169 | 27.0 |
| UF1 | Rearview mirror map light | $5.00 | 16,101 | 42.9 |
| YF5 | California emission test | $20.00 | n/a | n/a |
| Z07 | Off road suspension and brake package (3) | $400.00 | 47 | 0.4 |
| (1) Percentages are calculated on
the number of options sold vs. the number possible. For example,
C08 was only available on the Auxiliary Hardtop so the 14.5%
reflects the number of Auxiliary Hardtops (2,612) ordered with
the C08 option (367). (2) The M40 was no cost with the base 350-cid, 190-hp engine but $103 ($97 early in production) with RPO LS4 and RPO L82 engines. The RPO M21 was standard and only available with RPO L82 and RPO LS4 engines while the M20 was standard with the base 350-cid, 190-hp engine. (3) RPO Z07 was only available with RPO L82 (6,690) or RPO LS4 (3,494) engine option - not available with M40 transmission so percentage is probably less than 0.4%. >> RPO C08 was only available in black. >> Convertible folding tops were limited to choices of black or white. >> RPO YJ8, cast aluminum wheels appeared on early 1974 options lists, but Chevrolet records indicate none were sold. >> RPO P02 Deluxe Wheel Covers were no longer available. No optional wheels or wheel covers for 1974. All 1974 Corvettes were equipped with rally wheels. |
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1974 Exterior/Interior Colors
| Paint Code | Color (Quantity) | Interior Color Choices * |
| 10 | Classic White | Black - Dark Blue - Dark Red - Neutral - Saddle - Silver |
| 14 | Silver Mist | Black - Dark Blue - Dark Red - Saddle - Silver |
| 17 | Corvette Gray | Black - Dark Blue - Dark Red - Neutral - Saddle - Silver |
| 22 | Corvette Medium Blue | Black - Midnight Blue - Silver |
| 48 | Dark Green | Black - Neutral - Saddle - Silver |
| 56 | Bright Yellow | Black - Neutral - Saddle - Silver |
| 68 | Dark Brown | Black - Neutral - Saddle - Silver |
| 74 | Medium Red | Black- Dark Red - Neutral - Saddle - Silver |
| 76 | Mille Miglia Red | Black - Dark Red - Neutral - Saddle - Silver |
| 80 | Corvette Orange | Black - Neutral - Saddle - Silver |
| The exterior/interior combinations are suggested combinations that would be attractive to the average customer. Orders for non-recommended combinations for the coupe models may be submitted provided the dealer initials the appropriate order form block as verification. This does not apply to the convertible models and only those combinations are approved. | ||
Interior Trim Codes
| RPO | Color/Material |
| 400 | Black vinyl |
| 404 | Black leather * |
| 406 | Silver vinyl |
| 407 | Silver leather * |
| 408 | Neutral vinyl |
| 413 | Dark Blue vinyl |
| 415 | Saddle vinyl |
| 416 | Saddle leather * |
| 425 | Dark Red vinyl |
* Deluxe interior in black, saddle, or silver leather. Includes leather seat trim, wood-grain accents and lower carpet trim on interior door panels, wood-grain accents on console and special cut-pile carpeting.
1974 OEM Supplier Paint Colors
| Color | Valspar Code | PPG Code | DuPont Code | RM Code | SW Code | WA Code |
| 10 - Classic White | W041 | 8631 | 5040 | 1802 | 2517 | 3465 |
| 14 - Silver Mist | S051 | 2519 | 5563 | 2619 | n/a | 4319 |
| 17 - Corvette Gray | MW7401 | 2630 | 42817 | 2698 | n/a | 4547 |
| 22 - Corvette Medium Blue | L3427 | 2744 | 5564 | 2624 | n/a | n/a |
| 48 - Dark Green | G1015 | 2644 | 42816 | 2716 | n/a | 4548 |
| 56 - Bright Yellow | Y476 | 2094 | 5026 | 2709G | n/a | 3893 |
| 68 - Dark Brown | B1082 | 2543 | 42804 | 2647D | n/a | n/a |
| 74 - Medium Red | R238 | 2658 | 42810 | 2647D | n/a | 4533 |
| 76 - Mille Miglia Red | R1127 | 2349 | 5291 | 2460 | n/a | 4147 |
| 80 - Corvette Orange | A385 | 2548 | 5568 | 2652 | n/a | 4464 |
GM Heritage PDF file of specifications/options/etc.
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© C1-C3 CorvetteWorld
