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The 1970 Corvette

1970 Gray Corvette Convertible

The 1970 Chevrolet Corvette replaced the 4 side gills with an egg-crate vents on the side. The fenders were flared slightly to keep rocks from being kicked up and scratching the paint. The seats were redesigned again, this time to create more headroom. 1970 enlarged the "Big Block" (known as the Rat motor) to its largest displacement at 454 ci. The new option LT1 small block produced 370 bhp. The 350 engine was much lighter than the 454 and provided almost as much power as the lower end "Big Blocks". The RPO ZR1 option included the LT1 engine, M22 (Rock Crusher) transmission, heavy-duty power brakes, transistor ignition, special aluminum radiator, and special springs, shocks, front and rear stabilizer bars and metal fan shrouds. The relatively low production in 1970 was caused by a labor dispute that started in May of 1969. This dispute caused the 1969 production run to be stretched 4 months and the 1970 run to be cut short. Tuxedo Black was no longer available as an exterior color although there were probably a few cars that were painted black as special orders.

Production Options and Build Statistics

Total 1970 Corvettes Built - 17,316

Total 1970 Coupes - 10,668
Total 1970 Convertibles - 6,648

Serial Numbers
Coupe194370S100001 - 194670S117316
Convertible194670S100001 - 194670S117316

Serial Number Decoder

PositionCharacterDescription
11Chevrolet Division
2-394Body Series: Corvette
4-567Convertible
4-537Coupe
691969
7SAssembled in St. Louis, MO
8 to 13100001 to 117316Production Sequence

Engine Serial Number Decoder

1970 Corvette engines have the last six digits of the VIN stamped on the block after the engine number

PositionValueDescription
1 to 70001001sequential production number
8F or TFlint, MI or Tonawanda, NY
9 to 11CTGCarburetion & transmission350-cid 300-hp V-810.25:1THM-400 automaticfour-barrel
9 to 11CTMCarburetion & transmission350-cid 300-hp V-810.25:1THM-400 automaticfour-barrel
9 to 11CTDCarburetion & transmission350-cid 300-hp V-810.25:1manualfour-barrel
9 to 11CTLCarburetion & transmission350-cid 300-hp V-810.25:1manualfour-barrel
9 to 11CTNCarburetion & transmission350-cid 350-hp V-811.0:1manualfour-barrel
9 to 11CTOCarburetion & transmission350-cid 350-hp V-811.0:1manualfour-barrel
9 to 11CTPCarburetion & transmission350-cid 350-hp V-811.0:1manualfour-barreltransistor ignition
9 to 11CTQCarburetion & transmission350-cid 350-hp V-811.0:1manualfour-barreltransistor ignition
9 to 11CTRCarburetion & transmission350-cid 370-hp V-811.0:1M-22four-barreltransistor ignition
9 to 11CTUCarburetion & transmission350-cid 370-hp V-811.0:1M-22four-barreltransistor ignition
9 to 11CTVCarburetion & transmission350-cid 370-hp V-811.0:1M-22four-barreltransistor ignition
9 to 11CGWCarburetion & transmission454-cid 390-hp V-810.25:1manualfour-barrel
9 to 11CZUCarburetion & transmission454-cid 390-hp V-810.25:1manualfour-barrel
9 to 11CZLCarburetion & transmission454-cid 465-hp V-811.25:1manualfour-barrelaluminum heads, transistor ignition
9 to 11CZNCarburetion & transmission454-cid 465-hp V-811.25:1THM-400 automaticfour-barrelaluminum heads, transistor ignition
9 to 11CRICarburetion & transmission454-cid 390-hp V-810.25:1manualfour-barrel
9 to 11CTHCarburetion & transmission350-cid 350-hp V-811.0:1manualfour-barrel
9 to 11CTJCarburetion & transmission350-cid 350-hp V-811.0:1manualfour-barrel
9 to 11CTKCarburetion & transmission350-cid 370-hp V-811.0:1manualfour-barreltransistor ignition
9 to 11CRJCarburetion & transmission454-cid 390-hp V-810.25:1THM-400 automaticfour-barreltransistor ignition

The body number plate is located on the engine side of the cowl. The Fisher Body Style Number identifies the model of Corvette. 70-19467 - Corvette Sting Ray convertible 70-19437 - Corvette Sting Ray coupe The body number is the serial number of the body. The trim number represents the color of the interior, the paint color is the exterior paint color.

Production Options

RPO
Description
Cost
Total
Prod.
%
19437Base Coupe$5,192.00 10,668 61.6%
19467Base Convertible$4,849.00 6,648 38.4%
N/ACustom Interior Trim$158.00 3,191 18.4%
A31Power Windows$63.20 4,813 27.8%
A85Custom Shoulder Belts (std. w/ coupe)$42.15 475 2.7%
C07Auxiliary Hardtop (Convert.)$273.85 2,556 14.8%
C08Vinyl Covering for Aux. Hardtop$63.20 832 4.8%
C50Rear Window Defroster$36.90 1,281 7.4%
C60Air Conditioning$447.65 6,659 38.5%
G81Optional Rear Axle$12.65 2,862 16.5%
J50Power Brakes$47.40 8,984 51.9%
L46350ci, 350hp Engine$158.00 4,910 28.4%
LS5454ci, 390hp Engine$289.65 4,473 25.8%
LT1350ci, 370hp Engine$447.60 1,287 7.4%
M214 Speed Manual, Close Ratio Transmission$0.00 4,383 25.3%
M224 Speed Manual, Close Ratio, Heavy Duty Transmission$95.00 25 0.1%
M40Turbo Hydra-Matic Automatic Transmission$0.00 5,102 29.5%
na9California Emissions$36.90 1,758 10.2%
N37Tilt-Telescopic Steering Column$84.30 5,803 33.5%
N40Power Steering$105.35 11,907 68.8%
P02Deluxe Wheel Cover$57.95 3,467 20.0%
PT7White Line Tires F70 x 15$31.30 6,589 38.1%
PU9White Letter Tires F70 x 15$33.15 7,985 46.1%
T60Heavy Duty Battery (std. w/ LS5)$15.80 165 1.0%
UA6Alarm System$31.60 6,727 38.8%
U69AM/FM Radio$172.75 14,579 84.2%
U79AM/FM Radio Stereo$278.10 2,462 14.2%
ZR1Special Purpose Engine Package$968.95 25 0.1%

Color Options for 1970

Interior options for exterior colors are suggested by Chevrolet. Any combination could be ordered.
RPO
Color
Cost
Soft Top Color
Interior Color
Total
Prod.
%
972Classic White$0.00BG-BK-WB-BK-BR-G-R-S N/A N/A
974Monza Red$0.00BG-BK-WBK-BR-R-S N/A N/A
975Marlboro Maroon$0.00BG-BK-WBK-BR-S N/A N/A
976Mulsanne Blue$0.00BB-BK-WB-BK N/A N/A
979Bridgehampton Blue$0.00BG-BK-WB-BK N/A N/A
982Donnybrooke Green$0.00BG-BK-WBK-BR-G-S N/A N/A
984Daytona Yellow$0.00BG-BK-WBK-G N/A N/A
986Cortez Silver$0.00BG-BK-WB-BK-BR-G-R-S N/A N/A
991Ontario Orange$0.00BG-BK-WBK-S N/A N/A
992Laguna Gray$0.00BG-BK-WB-BK-BR-G-R-S N/A N/A
993Corvette Bronze$0.00BG-BK-WBK N/A N/A
Color Codes: B= Blue, BG=Beige, BK=Black, BR=Brown, G=Green, L=Leather, R=Red, S=Saddle, V=Vinyl, W=White

Interior Colors

RPO
Color
Cost
Total
Prod.
%
400Black Vinyl$0.00 N/A N/A
403Black Leather$0.00 N/A N/A
407Red Vinyl$0.00 N/A N/A
411Blue Vinyl$0.00 N/A N/A
414Brown Vinyl$0.00 N/A N/A
418Saddle Vinyl$0.00 N/A N/A
424Saddle Leather$0.00 N/A N/A
422Green Vinyl$0.00 N/A N/A


1970 Corvette Specifications

Mechanical Dimensions

FeatureCoupeConvertible
Wheelbase98 inches (2.489 m)98 inches (2.489 m)
Overall length182.5 inches (4.636 m)182.5 inches (4.636 m)
Overall width69.0 inches (1.753 m)69.0 inches (1.753 m)
Overall height47.4 inches (1.204 m)
Front tread58.7 inches (1.491 m)58.7 inches (1.491 m)
Rear tread59.4 inches (1.509 m)59.4 inches (1.509 m)
TiresF70-15F70-15
FrameFull-length welded-steel ladder type with five cross members. Steel box sections, welded.Full-length welded-steel ladder type with five cross members. Steel box sections, welded.
Front suspensionIndependent, unequal-length A-arms, coil springs tubular shocks and stabilizer barIndependent, unequal-length A-arms, coil springs tubular shocks and stabilizer bar
Rear suspensionIndependent, trailing arms, toe links, transverse chromium-carbon steel leaf spring, tube shocks, and anti-roll barIndependent, trailing arms, toe links, transverse chromium-carbon steel leaf spring, tube shocks, and anti-roll bar
SteeringSaginaw recirculating ball, 17.6:1 ratio, 2.9 turns to lock, 39.0 turning circleSaginaw recirculating ball, 17.6:1 ratio, 2.9 turns to lock, 39.0 turning circle
Rear axle typeSprung differential, Hypoid gearSprung differential, Hypoid gear
BrakesHydraulic, vented four wheel discs 11.75-inch diameter, single calipers, optional power assistHydraulic, vented four wheel discs 11.75-inch diameter, single calipers, optional power assist
Swept area11.75" front and back11.75" front and back
Total swept area461 sq. in.461 sq. in.
Wheels8" wide slotted steel 15" 5-lug disc8" wide slotted steel 15" 5-lug disc
Standard rear axle ratio3.36:13.36:1
Optional rear axle ratio2.73:1, 3.08:1, 3.36:1, 3.55:1, 4.11:1, 4.56:12.73:1, 3.08:1, 3.36:1, 3.55:1, 4.11:1, 4.56:1


Engine Specifications

FeatureBase Engine RPO ZQ3RPO L46RPO LS5RPO LT1RPO LS7
TypeV-8, Overhead valveV-8, Overhead valveV-8, Overhead valveV-8, Overhead valveV-8, Overhead valve
BlockCast iron blockCast iron blockCast iron blockCast iron blockCast iron block
Displacement350 cid350 cid454 cid350 cid454 cid
Bore & Stroke4.00 x 3.48"4.00 x 3.48"4.251 x 4.00"4.00 x 3.48"4.251 x 4.00"
Compression ratio10.25:111.0:110.25:111.0:111.25:1
Brake horsepower300 @ 4800350 @ 5600390 @ 4800370 @ 6000465 @ 5200
Torque380 lb-ft @ 3800500 lb-ft @ 3400380 lb-ft @ 4000490 @ 5200
Main bearingFiveFiveFiveFiveFive
Valve liftersHydraulicHydraulicHydraulicSolid valve liftersSolid valve lifters
CamshaftHigh-performance camshaftHigh-performance camshaftHigh-performance camshaft
Fuel supplyRochester Quadra-Jet four-barrel Model 4MVRochester Quadra-Jet four-barrel Model 4MVRochester 750CFM four-barrelHolley four-barrel on aluminum intake manifoldHolley 800CFM four-barrel
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