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1968 Chevrolet Corvette C3 Convertible in Safari Yellow
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1968 Corvette Specs

Body Specs

Wheelbase 98.00 inches
Overhand (Front) 40.2 inches
Overhang (Rear) 43.9 inches
Front Track 58.3 inches
Rear Track 59.0 inches
Length (less bumpers) 179.2 inches
Length 182.1 inches
Front Fender Overall Width 69.2 inches
Rear Fender Overall Width 68.6 inches
Overall Height (Design, Coupe) 47.8 inches
Front Bumper to Ground 9.2 inches
Rear Bumper to Ground 12.3 inches
Hood (at Rear) to Ground 26.6 inches
Rocker Panel to Ground (Front) 7.6 inches
Rocker Panel to Ground (Rear) 7.6 inches
Bottom of Door to Ground (Closed) 10.0 inches
Windshield Slope Angle 53°
Body Zero to Ground (Front) 7.6 inches
Body Zero to Ground (Rear) 7.6 inches
Headlamp to Ground 17.5 inches
Tail Lamp to Ground 25.7 inches
Hood Length at Centerline 54.4 inches
Body Upper Structure Length at Centerline 54.7 inches (Coupe)
Front Bumper to Ground 9.2 inches
Rear Bumper to Ground 12.3 inches
Oil Pan to Ground 4.8 inches
Front Suspension to Ground 3.7 inches
Flywheel Housing to Ground 5.2 inches
Exhaust System to Ground 4.9 inches
Spare Tire Well to Ground 5.1 inches
Minimum Running Ground Clearance 4.9 inches
Head Room 36.2 inches (Coupe)
37.1 inches (Convertible, Soft Top)
36.0 inches (Convertible, Hard Top)
Shoulder Room 46.9 inches
Hip Room 48.8 inches
Tire Size F70-15-4PR
Recommended Tire Inflation 24 PSI
Wheels, Regular Production Size: 15 x 7.00
Three Speed Transmission 1st Gear 2.54:1
2nd Gear 1.50:1
3rd Gear 1.00:1
Reverse Gear 2.63:1
Turbo Hydra-Matic (Automatic) Transmission
(Not Available with L71 Engine)
1st Gear 2.48:1
2nd Gear 1.48:1
3rd Gear 1.00:1
Reverse Gear 2.08:1
Lubricant Capacity 3 Quarts
Four Speed M20 Transmission
(Not available with L71 Engine)
1st Gear 2.52:1
2nd Gear 1.88:1
3rd Gear 1.47:1
4th Gear 1.00:1
Reverse Gear 2.59:1
Close Ratio Four Speed
M21 Transmission
(Not available with Standard Engine)
1st Gear 2.20:1
2nd Gear 1.64:1
3rd Gear 1.27:1
4th Gear 1.00:1
Reverse Gear 2.26:1
Transmission Lubricant Type Military MIL-L-2105-B
SAE 80
Lubricant Capacity Three Speed: 2 Quarts
Four Speed: 2.5 Quarts
Differential Lubricant Type Military MIL-L-2105-B
SAE 80
Differential Lubricant Capacity 3.7 pints
Axle Ratio Standard: 3.36:1
Turbo Hydra-Matic (Automatic): 2.73:1
Optional: 3.08:1
L36, L68, L79 Engines: 3.36:1, 3.55:1, 4.11:1
L71 Engine: 3.36:1, 3.55:1, 3.70:1, 4.11:1
Transmission Synchromesh Three Speed: 2nd and 3rd Gears
Four Speed: All Four Gears
Standard Fuel Tank Capacity 20 Gallons
Steering Wheel Diameter
(Power, Manual Steering)
16.0 inches
Steering Ratio 16.0:1
Wheel Turns 3.4


Weight

Model 19467 Convertible Front - Curb: 1,565; Shipping: 1,570 lb.
Rear - Curb: 1,655; Shipping: 1,495 lb.
Total - Curb: 3,220; Shipping: 3,065 lb.
Model 19437 Sport Coupe Front - Curb: 1,570; Shipping: 1,570 lb.
Rear - Curb: 1,640; Shipping: 1,485 lb.
Total - Curb: 3,210; Shipping: 3,055 lb.

Power to Weight Ratio
Three Speed Manual Transmission 300 Horsepower Standard Engine: 3,510 lb.
Pounds / Horsepower: 11.70
Four Speed Manual Transmission 300 Horsepower Standard Engine: 3,504 lb.
Pounds / Horsepower: 11.68
Four Speed Manual Transmission 350 Horsepower L79 Engine: 3,516 lb.
Pounds / Horsepower: 10.05
Four Speed Manual Transmission 390 Horsepower L36 Engine: 3,682 lb.
Pounds / Horsepower: 9.44
Four Speed Manual Transmission 400 Horsepower L68 Engine: 3,686 lb.
Pounds / Horsepower: 9.21
Four Speed Manual Transmission 435 Hosepower L71 Engine: 3,653 lb.
Pounds / Horsepower: 8.40
Turbo Hydra-Matic
Automatic Transmission
300 Horsepower Standard Engine: 3,573 lb.
Pounds / Horsepower: 11.91
Turbo Hydra-Matic
Automatic Transmission
390 Horsepower L36 Engine: 3,751 lb.
Pounds / Horsepower: 9.62
Turbo Hydra-Matic
Automatic Transmission
400 Horsepower L68 Engine: 3,755 lb.
Pounds / Horsepower: 9.38
Weight Differentials
Power Windows (RPO A31) +5 lb.
Auxiliary Top (RPO C07) +48 lb.
Air Conditioning (RPO C60) +95 lb.
Power Brakes (RPO J50) +10 lb.
Heavy Duty Power Brakes (RPO J56) +6 lb.
427 cubic inch Engine
390 Horsepower (RPO L36)
+178 lb.
427 cubic inch Engine
400 Horsepower (RPO L68)
+4 lb.
427 cubic inch Engine
435 Horsepower (RPO L71)
+149 lb.
327 cubic inch Engine
350 Horsepower (RPO L79)
+12 lb.
Aluminum Cylinder Heads (RPO L89) -73 lb.
Four Speed Transmission (RPO M20) -6 lb.
Turbo Hydra-Matic (Automatic) Transmission (RPO M40) +63 lb.
Power Steering (RPO N40) +21 lb.
Radio AM - FM Pushbutton (RPO U69) +16 lb.
Radio Stereo Equipment (RPO U79) +11 lb.
Power Brakes +10 lb.


Engine Specs

Type: V8
Valve Location: In Head
Bore / Stroke: 4.00" / 3.25" (Standard, L79 327 Cubic Inch)
4.25" / 3.76" (L36, L72 427 Cubic Inch)
Displacement: Standard, L79: 327 Cubic Inches
L36, L68, L71: 427 Cubic Inches
Compression Ratio: 10.0:1 (Standard Engine)
10.25:1 (L36, L68 Engines)
11.0:1 (L71, L79 Engines)
Rocker Arms Stamping, Steel
Rocker Arm Ratio 1.5:1
Valve Train Lash, Inlet / Exhaust
Hydraulic Lifters
Zero
Valve Train Lash, Inlet / Exhaust
Mechanical Lifters (RPO L72)
Inlet: .024 inch
Exhaust: .028 inch
Crankshaft Material: Forged Steel
Camshaft Material: Cast Alloy Iron
Oil Pump Type: Gear
Normal Oil Pressure 30 - 45 psi @ 1,500 RPM
50 - 75 psi @ 2,000 RPM
Oil Pressure Gauge Mechanical
Crankcase Oil Capacity, Standard, L79 Engines 4 Quarts, Less Filter
5 Quarts, With Filter
Crankcase Oil Capacity, L36, L68, L71, L88 and L89 Engines 5 Quarts, Less Filter
6 Quarts, With Filter
Recommended Oil Grade Above 32°: SAE 20W, SAE 10W-30
To 0°: SAE 10W or SAE 10W-30
Below 0°: SAE 5W or SAE 5W-20
Fuel Filter Strainer
Fuel Pump Mechanical
Fuel Pressure 5¼ - 6½ PSI
Cooling System Capacity 327 cubic inch Engines
16 Quarts (with heater)
15 Quarts (without heater)
427 cubic inch Engines
23 Quarts (with heater)
22 Quarts (without heater)
Thermostat Type Choke
Radiator Cap Relief Pressure 15 +/- 1 PSI
Battery 12 volt
61 Amp hr. @ 20 hr.
6 cells / 66 Plates
Thermostat Opening 192° - 198° F

Brakes
Type Caliper Disc, Four Wheel Hydraulic
Effective Area 78.1 Square Inches
Swept Area 461.2 Square Inches
Disc Vented
Pistons per Caliper Four

Horsepower
Standard Engine (327 cubic inch) 300 hp @ 5,000 RPM;
Torque: 360 lb-ft @ 3,400 RPM
RPO L79 (327 cubic inch) 350 hp @ 5,800 RPM;
Torque: 360 lb-ft. @ 3,600 RPM
RPO L36 (427 cubic inch) 390 hp @ 5,200 RPM;
Torque: 460 lb-ft @ 3,600 RPM
RPO L68 (427 cubic inch) 400 hp @ 5,400 RPM;
Torque: 460 lb-ft @ 3,600 RPM
RPO L71 (427 cubic inch) 435 hp @ 5,800 RPM;
Torque: 460 lb-ft @ 4,000 RPM

Ignition System
Coil Delco-Remy 1115202 Base, L79; 1115264 L36, L68; 1111141 L36; 1115210 L71
Coil current rating 4 amps (engine stopped)
1.8 amps (engine running)
Breaker Gap .019" (New)
Ignition Timing
Initial Design Setting
6° @ 500 RPM (Standard Engine)
10° @ 700 RPM (L79 Engine)
4° @ 550 RPM (L36, L68 Engines)
4° @ 750 RPM (L71 Engine)
Ignition Timing Centrifugal Advance Begins: 900 RPM (Standard, 427 Engines)
950 RPM (L79 Engine)
15° @ 1,500 RPM (Standard);
20°: @ 1,800 RPM (L79 Engine)
17° @ 2,000 RPM (L36, L68 Engines);
Max: 30° @ 5,100 RPM (Standard Engine);
Max: 30° @ 4,700 RPM (L79 Engine);
Max: 32° @ 5,000 RPM (L36, L68 Engines)
Max: 30° @ 3,800 RPM (L71 Engine)
Ignition Timing Vacuum Advance Begins: 6 inches Hg (Standard Engine)
Maximum: 15° @ 12 inches Hg
Begins: 6 inches Hg (L79 Engine)
Maximum: 15° @ 15.5 inches Hg
Begins: 7 inches Hg (L36, L68 Engines)
Maximum: 12° @ 12 inches Hg
Begins: 8 inches Hg (L71 Engine)
Maximum: 15° @ 15.5 inches Hg
Spark Plug AC44 (327 Cubic Inch Engines)
AC43N (427 Cubic Inch Engines)
Spark Plug Thread 14 mm.
Spark Plug Torque 25 lb.-ft.
Spark Plug Gap .033 - .038 inch
Firing Order 1-8-4-3-6-5-7-2

1968 Corvette Options

RPO Description Production Price