C1 - 1953-1962
C2 - 1963-1967
C3 - 1968-19821968 Corvette
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The "fastback" coupe design was replaced with a quasi-solid top with removable panels for the driver and passenger side resulting in a T-Top configuration. Door openers were now a push button and a handle that had to be depressed to open the doors. The auxiliary hardtop for convertibles featured a glass rear window. The Powerglide 2-speed automatic transmission was replaced with a new 3-speed automatic transmission. The 'gills' on the front fenders would change from year to year. A fiber-optic system was adapted for the tail lamps and license plate lamp; these indicators were located on the console just below the transmission shifter. "Astro-Ventilation" was introduced this year to aid in airflow throughout the cabin. The Corvette Sing Ray designation was gone, but only for 1968. It would return as "Stingray" for 1969. The 1968 model year would be the last year for the 327 cid V8 engine. For the first time all engines have flash-chromed rocker arm covers.
The coupe designation was no longer a fastback style of the C2 years but rather a solid top with removable panels for driver and passenger for a T-Top configuration.
Conventional door handles were replaced with a button to actuate the
door latch. The recessed 'flap' is just used as a hand gold and give
some leverage in depressing the door latch button.
1968 total Corvettes built - 28,566
1968 coupes - 9,936
1968 convertibles - 18,630
| Serial Numbers | |
| Corvette | 194x78S400001-194x78S428566 |
| Coupe is body style 37 and convertible is body style 67 | |
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 | HT - 327-cid 350-hp, manual transmission, 4-bbl carburetor, A.I.R. |
| A.C. | Air Conditioning | |
| A.I.R. | Air Injection Reactor All w/manual transmission |
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| C.C.S. | Controlled Combustion System All w/automatic transmission |
Engine Specifications - 327 engines
| Item | Base RPO L75 | RPO L79 |
| Displacement | 327 cid | 327 cid |
| Bore & Stroke | 4.00" x 3.25" | 4.00" x 3.25" |
| Compression Ratio | 10.25:1 | 11.0:1 |
| Advertised Horsepower | 300 hp @ 5000 rpm | 350 hp @ 5800 rpm |
| Torque | 360 lb-ft @ 3400 rpm | 360 lb-ft @ 3600 rpm |
| Valve lifter type | Hydraulic | Hydraulic |
| Fuel system | Rochester 4-bbl 7028207 - Manual 7028208 - Automatic |
Rochester 4-bbl 7028219 - Manual |
Engine Specifications - 427 engines
| Item | RPO L36 | RPO L68 | RPO L71 | RPO L88 |
| Displacement | 427 cid | 427 cid | 427 cid | 427 cid |
| Bore & Stroke | 4.251" x 3.76" | 4.251" x 3.76" | 4.251" x 3.76" | 4.251" x 3.76" |
| Compression Ratio | 10.25:1 | 10.25:1 | 11.0:1 | 12.5:1 |
| Advertised Horsepower | 390 hp @ 5400 rpm | 400 hp @ 5400 rpm | 435 hp @ 5800 rpm | 430 hp @ 4600 rpm |
| Torque | 460 lb-ft @ 3600 rpm | 460 lb-ft @ 3600 rpm | 460 lb-ft @ 4000 rpm | 485 hp @ 4000 rpm |
| Valve lifter type | Hydraulic | Hydraulic | Mechanical | Mechanical |
| Fuel system | Rochester 4-bbl 7028209 - Manual 7028216 - Automatic |
Holley 3 x 2-bbl 3925517 - Manual primary 3902353 - Manual secondary 3925516 - Automatic primary 3902353 - Automatic secondary |
Holley 3 x 2-bbl 3825517 - Manual primary 3902353 - Manual secondary |
Holley 4-bbl - 3925519 |
Regular Production Options
| RPO | Description | Cost | Units | % (1) |
| 19437 | Coupe | $4,663.00 | 9,936 | 34.8 |
| 19467 | Convertible | $4,320.00 | 18,630 | 65.2 |
| 402-436 | Leather seats | $79.00 | 2,429 | 8.5 |
| A01 | Tinted windows (all) | $15.80 | 17,635 | 61.7 |
| A02 | Tinted windows (windshield only) | $10.55 | 5,509 | 19.3 |
| A31 | Power windows | $57.95 | 7,065 | 24.7 |
| A82 | Headrests | $42.15 | 3,197 | 11.2 |
| A85 | Custom shoulder belts | $26.35 | 350 | 1.2 |
| C07 | Auxiliary hardtop (convertible only) | $231.75 | 8,735 | 46.89 |
| C08 | Soft trim roof cover for auxiliary hardtop | $52.70 | 3,050 | 34.9 |
| C50 | Rear window defroster | $31.60 | 693 | 2.4 |
| C60 | Air conditioning | $412.90 | 5,664 | 19.8 |
| F41 | Special suspension | $36.00 | 1,758 | 6.2 |
| G81 | Positraction | $46.35 | 27,008 | 94.5 |
| J50 | Power brakes | $42.15 | 9,559 | 33.5 |
| J56 | Heavy duty brakes | $384.45 | 81 | 0.3 |
| K66 | Transistor ignition | $73.75 | 5,457 | 19.1 |
| L36 | 427-cid, 390-hp | $200.15 | 7,717 | 27.0 |
| L68 | 427-cid, 400-hp (3x2) | $305.50 | 1,932 | 6.8 |
| L71 | 427-cid, 435-hp (3x2) | $437.10 | 2,898 | 10.1 |
| L79 | 327-cid, 350-hp | $105.35 | 9,440 | 33.0 |
| L88 | 427-cid, 430-hp | $947.90 | 80 | 0.3 |
| L89 | 427-cid, 435-hp, aluminum heads (3x2) | $805.75 | 624 | 21.53 |
| M20 | Wide ratio 4-speed transmission | $184.35 | 10,760 | 37.7 |
| M21 | Close ratio 4-speed transmission | $184.35 | 12,337 | 43.2 |
| M22 | Heavy duty close ratio 4-speed transmission | $263.30 | 80 | 0.3 |
| M40 | Turbo Hydra-Matic 3-speed automatic transmission | $226.45 | 5,063 | 17.7 |
| N11 | Off-road exhaust system | $36.90 | 4,695 | 16.4 |
| N36 | Telescopic steering column | $42.15 | 6,447 | 22.6 |
| N40 | Power steering | $94.80 | 12,364 | 43.3 |
| P01 | Wheel covers | $57.95 | 8,971 | 31.4 |
| PT6 | F70 x 15 red stripe tires | $31.30 | 11,686 | 40.9 |
| PT7 | F70 x 15 white stripe tires | $31.30 | 9,692 | 33.9 |
| UA6 | Alarm system (May, 1968) | $26.35 | 388 | 1.4 |
| U15 | Speed warning indicator | $10.55 | 3,453 | 12.1 |
| U69 | AM/FM radio | $172.75 | 24,609 | 86.1 |
| U79 | AM/FM stereo radio | $278.10 | 3,311 | 11.6 |
| (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 34.9% reflects the number of Auxiliary Hardtops ordered with the C08 option. | ||||
1968 Exterior/Interior Colors
| RPO | Color | Soft Top Color Choices* | Interior Color Choices | Units | % (2) |
| 900 | Tuxedo Black | * | Black - Dk Blue - Dk Orange - Gunmetal - Med Blue - Red - Tobacco | 708 | 2.5 |
| 972 | Polar White | * | Black - Dk Blue - Dk Orange - Gunmetal - Med Blue - Red - Tobacco | 1,868 | 6.5 |
| 974 | Rally Red | * | Black - Red | 2,918 | 10.2 |
| 976 | LeMans Blue | * | Black - Dk Blue - Med Blue | 4,722 | 16.5 |
| 978 | International Blue | * | Black - Dk Blue - Med Blue | 2,473 | 8.7 |
| 983 | British Green | * | Black - Saddle - Tobacco | 4,779 | 16.7 |
| 984 | Safari Yellow | * | Black | 3,133 | 11.2 |
| 986 | Silverstone Silver | * | Black - Dk Blue - Gunmetal | 3,435 | 12.0 |
| 988 | Cordovan Maroon | * | Black | 1,155 | 4.0 |
| 992 | Corvette Bronze | * | Black - Dk Orange - Tobacco | 3,374 | 11.8 |
| * Black, Beige, or White were available colors
for a soft convertible top with any body color. (2) Percentages are of the car's color and is not soft top colors or interior color options percentages. |
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Interior Trim Codes
| RPO | Color/Material |
| Standard | Black vinyl |
| 402 | Black leather |
| 407 | Red vinyl |
| 408 | Red leather |
| 411 | Dk Blue vinyl |
| 412 | Dk Blue leather |
| 414 | Medium Blue vinyl |
| 415 | Medium Blue leather |
| 420 | Saddle vinyl |
| 421 | Saddle leather |
| 425 | Orange vinyl |
| 426 | Orange leather |
| 435 | Tobacco vinyl |
| 436 | Tobacco leather |
| 442 | Gunmetal vinyl |
1968 OEM Supplier Paint Colors
| Color | Valspar Code | PPG Code | DuPont Code | RM Code | SW Code | WA Code |
| Polar White | W041 | 8631 | 4714 | 1802 | 2517 | 3465 |
| Tuxedo Black | K090 | 9300 | 99 | 946 | 3069 | n/a |
| LeMans Blue Metallic | MW6801 | 13519 | 4908 | n/a | n/a | 3742 |
| International Blue Metallic | L2982 | 13550 | 4909 | n/a | n/a | 3743 |
| British Green Metallic | G1203 | 43795 | 4949 | n/a | n/a | 3829 |
| Safari Yellow | Y476L | 81621 | 4906 | n/a | n/a | 3795 |
| Rally Red | R1163L | 71491 | 4688 | 1744 | 2453 | 3395 |
| Silverstone Silver Metallic | S501 | 8596 | 4907 | n/a | n/a | 3796 |
| Cordovan Maroon Metallic | R1141 | 50775 | 4915 | n/a | n/a | 3821 |
| Corvette Bronze Metallic | B2408 | 22969 | 4910 | n/a | n/a | n/a |
GM Heritage PDF file of specifications/options/etc.
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© C1-C3 CorvetteWorld
