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1974 Chevrolet Corvette C3
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1974 Corvette Specs

Body Specs

Wheelbase 98.0 inches
Overhand (Front) 42.8 inches
Overhang (Rear) 44.7 inches
Front Track 58.7 inches
Rear Track 59.5 inches
Length 185.5 inches
Ground Clearance
Rear Axle Differential to Ground
6.2 inches
Minimum Running Clearance 4.2 inches
(Exhaust Pipe at X-Member)
Overall Height 47.7 inches (Coupe)
47.8 inches (Convertible)
Rocker Panel to Ground (Front) 7.5 inches
Rocker Panel to Ground (Rear) 7.5 inches
Luggage Capacity 6.1 Cubic Feet (Coupe)
5.0 Cubic Feet (Convertible)
Cowl Height 36.3 inches
Windshield Slope Angle 57°
Head Room 36.2 inches (Coupe)
37.1 inches (Convertible, Soft Top)
36.0 inches (Convertible, Hard Top)
Shoulder Room 47.9 inches
Hip Room 48.8 inches
Tire Size GR70-15B
Recommended Tire Inflation 20 PSI Cold (Front, Rear)
Wheels, Regular Production Size: 15 x 8
Synchronization All Forward Gears
Turbo Hydra-Matic (Automatic) Transmission 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 1st Gear 2.52:1
2nd Gear 1.88:1
3rd Gear 1.46:1
4th Gear 1.00:1
Reverse Gear 2.59:1
Close Ratio Four Speed
M21 Transmission
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 Four Speed Manual: 2.5 Quarts
Differential Lubricant Type Military MIL-L-2105-B
SAE 80
Differential Lubricant Capacity 3.7 pints
Axle Ratio 195 Horsepower Base Engine
3.08:1, 3.36:1
250 Horsepower L82 Engine
3.55:1, 3.70:1
270 Horsepower 454 Cubic Inch LS4 Engine
3.08:1, 3.36:1 (3.55:1 with M21 Transmission)
Transmission Synchromesh All Four Gears
Standard Fuel Tank Capacity 18 Gallons
Steering Wheel Diameter
(Power, Manual Steering)
15.0 inches
Steering Ratio 16.1:1
Wheel Turns 3.4 (Street)
2.92 (Fast)
Turning Diameters 37.0 feet (Curb to Curb)
38.6 feet (Wall to Wall)


Weight

Model 19467 Convertible
(Curb)    Front: 1,664 lb.
Rear: 1,732 lb.
Total: 3,396 lb.

(Shipping)    Total: 3,315 lb.
Model 19437 Sport Coupe
(Curb)    Front: 1,671 lb.
Rear: 1,719 lb.
Total: 3,390 lb.

(Shipping)    Total: 3,309 lb.
Shipping Weight: Weight of basic vehicle with regular equipment, including grease, oil, engine coolant to capacity and (4) gallons of gasoline and engine coolant to capacity.

Weight Differentials
Auxiliary Top (RPO C07) +69 lb.
(+59 lb. Front; +10 lb. Rear)
Air Conditioning (RPO C60) +81 lb. (With Standard, L82 Engines)
(+65 lb. Front; +16 lb. Rear)
+87 lb. (With LS4 Engine)
(+70 lb. Front; +17 lb. Rear)
Power Windows (RPO A31) +7 lb.
(+4 lb. Front; +3 lb. Rear)
Power Brakes (RPO J50) +10 lb.
(+9 lb. Front; +1 lb. Rear)
L82 Engine
250 Horsepower
+14 lb.
(+11 lb. Front; +3 lb. Rear)
LS4 Engine
270 Horsepower
+200 lb.
(+178 lb. Front; +22 lb. Rear)
Standard, L82 350 cubic inch Engines
With Turbo Hydra Matic Transmission
+54 lb.
(+37 lb. Front; +17 lb. Rear)
LS4 Engine
270 Horsepower
With Turbo Hydra Matic Transmission
+45 lb.
(+31 lb. Front; +14 lb. Rear)
Power Steering +26 lb.
(+25 lb. Front; +1 lb. Rear)
With Standard, L82 Engines
+28 lb.
(+27 lb. Front; +1 lb. Rear)
With LS4 Engine
Radio, AM/FM Stereophonic
(RPO U58)
+18 lb.
(+11 lb. Front; +7 lb. Rear)
Radio, AM/FM Pushbutton
(RPO U69)
+14 lb.
(+7 lb. Front; +7 lb. Rear)


Engine Specs

Type: V8
Valve Location: In Head
Bore / Stroke: 4.00" / 3.48" (Standard, L82 350 Cubic Inch)
4.251" / 4.00" (LS4 454 Cubic Inch)
Displacement: Standard, L82 Engines: 350 Cubic Inches
LS4 Engine: 454 Cubic Inches
Compression Ratio: 8.5:1 (Standard Engine)
9.0:1 (L82 Engine)
8.25:1 (LS4 Engine)
Crankshaft Material: Forged Steel
Camshaft Material: Cast Alloy Iron
Oil Pump Type: Gear
Normal Oil Pressure 32 - 40 psi @ 2,000 RPM
42 - 46 psi @ 2,000 RPM
Oil Pressure Gauge Mechanical
Recommended Oil Grade Above 20°F: SAE 20W-20, SAE 10W-30, 10W-40
20W-40, 20W-50
0°F to 60°F: SAE 10W, 5W-30, 10W-30, 10W-40
Below 20°F: SAE 5W-20, 5W-30
Fuel Filter Strainer
Fuel Pump Mechanical
Fuel Pressure 5¼ - 6½ PSI
Cooling System Capacity 350 cubic inch Standard Engine
19 Quarts (with heater)
350 cubic inch L82 Engine
18 Quarts (with heater)
454 cubic inch LS4 Engine
24 Quarts (with heater)
Thermostat Type Choke
Radiator Cap Relief Pressure 15 +/- 1 PSI
Battery (Standard, L82 Engines) 12 volt - 78 plate
3,250 Watts @ 0° F
(LS4 Engine) 12 volt - 90 plate
4,000 Watts @ 0° F
Thermostat Opening 192° - 198° F (Base, LS4 Engines)
177° - 183° F (L82 Engine)

Brakes
Type Caliper Disc, Four Wheel Hydraulic
Effective Area 78.1 Square Inches
Swept Area 639.4 Square Inches
Disc Vented

Horsepower
Standard Engine (350 cubic inch) 195 hp @ 4,400 RPM;
Torque: 275 lb-ft @ 2,800 RPM
RPO L82 (350 cubic inch) 250 hp @ 5,200 RPM;
Torque: 285 lb-ft. @ 4,000 RPM
RPO LS4 (454 cubic inch) 270 hp @ 4,400 RPM;
Torque: 380 lb-ft @ 2,800 RPM

Ignition System
Coil Delco-Remy Base, L82 Engine: 1115270;
LS4: 1115287
Coil current rating 4 amps (engine stopped)
1.8 amps (engine running)
Breaker Gap .019"
Ignition Timing Centrifugal Advance Distributor | 1112247 | Base Engine
Start: 0° @ 800 - 1,200 RPM
Intermediate: 9 - 13° @ 2,400 RPM
Maximum: 16 - 20° @ 4,200 RPM
Distributor | 1112544* | Base Engine
Start: 0° @ 850 - 1,200 RPM
Intermediate: 13 - 15° @ 2,400 RPM
Maximum: 20 - 24° @ 4,200 RPM
Distributor | 1112150 | L82 Engine
Start: 0° @ 1,000 - 1,400 RPM
Intermediate: 10 - 14° @ 2,200 RPM
Maximum: 18 - 22° @ 5,000 RPM
Distributor | 1112114 | LS4 Engine
Start: 0° @ 850 - 1,300 RPM
Intermediate: 9 - 13° @ 2,400 RPM
Maximum: 16 - 20° @ 4,200 RPM
Ignition Timing Vacuum Advance Distributor | 1112247 | Base Engine
Start: 0° @ 5 - 7 inches Hg
Maximum: 13.5 - 20° @ 13.5 inches Hg
Distributor | 1112150 | L82 Engine
Start: 0° @ 5 - 7 inches Hg
Maximum: 13.5 - 20° @ 12 inches Hg
Distributor | 1112114 | LS4 Engine
Start: 0° @ 5 - 7 inches Hg
Maximum: 18.5 - 21.5° @ 15 inches Hg
Distributor | 1112544* | Base Engine
Start: 0° @ 5 - 7 inches Hg
Maximum: 13.5 - 16.5° @ 13.5 inches Hg
Timing Base Engine: 8° BTC @ 900 RPM (Manual)
Base Engine*: 4° BTC @ 900 RPM (Manual)
8° BTC @ 600 RPM (Automatic)
L82 Engine: 8° BTC @ 900 RPM (Manual)
8° BTC @ 700 RPM (Automatic)
LS4 Engine: 10° BTC @ 800 RPM (Manual)
10° BTC @ 600 RPM (Automatic)
*Pertains to Engines Used in California
Spark Plug ACR44T (350, 454 Cubic Inch Engines)
Spark Plug Thread 14 mm.
Spark Plug Torque 15 lb.-ft.
Spark Plug Gap .033 - .038 inch
Firing Order 1-8-4-3-6-5-7-2

1974 Corvette Options

RPO Description Production Price
* Custom Interior Trim 19,959 (53.22%) $154.00
Optional Rear Axle Ratios 1,219 (3.25%) $12.00
A31 Power Windows 23,940 (63.84%) $86.00
A85 Custom Shoulder Belts (standard with coupe) 618 (1.65%) $41.00
C07 Auxiliary Hardtop (for convertible) 2,612 (6.96%) $267.00
C08 Vinyl Covering (for auxiliary hardtop) 367 (0.98%) $329.00
C50 Rear Window Defroster 9,322 (24.86%) $43.00
C60 Air Conditioning 29,497 (78.65%) $467.00
FE7 Gymkhana Suspension 1,905 (5.08%) $7.00
J50 Power Brakes 33,306 (88.81%) $49.00
L82 350 cu. in. 250hp Engine 6,690 (17.84%) $299.00
LS4 454 cu. in. 270hp Engine 3,494 (9.32%) $250.00
M21 4-Speed Manual Transmission, close ratio 3,494 (9.32%) n/a
M40 Turbo Hydra-Matic Automatic Transmission 25,146 (67.05%) n/a
N37 Tilt-Telescopic Steering Column 27,700 (73.86%) $82.00
N41 Power Steering 35,944 (95.85%) $117.00
QRM White Stripe Steel Belted Tires, GR70x15 9,140 (24.37%) $32.00
QRZ White Letter Steel Belted Tires, GR70x15 24,102 (64.27%) $45.00
U05 Dual Horns 5,258 (14.02%) $4.00
U58 AM-FM Radio, stereo 19,581 (52.21%) $276.00
U69 AM-FM Radio 17,374 (46.33%) $173.00
UA1 Heavy Duty Battery (standard with LS4) 9,169 (24.45%) $15.00
UF1 Map Light (on rearview mirror) 16,101 (42.93%) $5.00
YF5 California Emission Test n/a $20.00
Z07 Off Road Suspension and Brake Package 47 (0.13%) $400.00

Total Production: 37,502
Coupe: 32,028 (85.40%)
Convertible: 5,474 (14.60%)

Notes: Base Corvette Coupe with 350 cu. in. 195 hp engine and wide ratio four speed manual transmission: $6,001.50.
Base Corvette Convertible with 350 cu. in. 195 hp engine and wide ratio four speed manual transmission: $5,765.00.

Colors

Code Exterior Quantity Interior Soft Top Wheels
10 Classic White n/a Black / Dark Blue / Dark Red / Neutral / Saddle / Silver Black / White Silver
14 Silver Mist n/a Black / Dark Blue / Dark Red / Neutral / Silver Black / White Silver
17 Corvette Gray n/a Black / Dark Blue / Dark Red / Neutral / Saddle / Silver Black / White Silver
22 Corvette Medium Blue n/a Black / Dark Blue / Silver Black / White Silver
48 Dark Green n/a Black / Neutral / Saddle / Silver Black / White Silver
56 Bright Yellow n/a Black / Neutral / Saddle / Silver Black / White Silver
68 Dark Brown n/a Black / Neutral / Saddle / Silver Black / White Silver
74 Medium Red n/a Black / Dark Red / Neutral / Saddle / Silver Black / White Silver
76 Mille Miglia Red n/a Black / Dark Red / Neutral / Saddle / Silver Black / White Silver
80 Corvette Orange n/a Black / Neutral / Saddle / Silver Black / White Silver


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