17.316 Corvettes were built in 1970. 10.668 Coupe and 6.648 Convertibles.
The Vehicle Identification Numbers, VIN were 194370S400001 through 194370S417316
For convertibles, fourth digit is a 6

Type Basic Basic Basic Basic Basic
Cubic Inch 350 350 350  454 454
HP @ RPM 300 @ 4800 350 @ 5600 370 @ 6000 390 @ 4800 460 @ 5600
Torque  RPM 380 @ 3200 380 @ 3600 380 @ 4000 500 @ 3400 490 @ 3000
Comp. Ratio 10.25:1 11.0:1 11.0:1 10.25:1 11.25:1
Bore / Stroke 4.00 x 3.48 4.00 x 3.48 4.00 x 3.48 4.251 x 4.00 4.251 x 4.00
Carburator 4bbl 4bbl  4bbl 4bbl 4bbl
In Manifold N/A N/A N/A N/A N/A
Valve Lifters N/A N/A N/A N/A N/A
Exhaust N/A N/A N/A N/A N/A
Oil Capacity2 4 Qt 4 Qt 4 QT 5 QT 5 QT
Spark Plugs Type R44 Type R44 Type R43 Type R43T Type R43T1
* Limited production engine
1 Models with aluminum heads use A.C R43XL
2. Add 1 Qt if you put a new oil filter.

3970010 350 CID - 300 HP - 330 HP & 370 HP
3963512 454 CID - 390 HP

3927186 350 CID - 300 HP - 330 HP & 370 HP
3927187 350 CID - 350 HP
3973414 350 CID - 370 HP
3964290 454 CID - 390 HP

350 Cubic Inch Engine CODE
Manual transmission CTL
Turbo Hydra-Matic CTM
Hi performance CTN
Hi performance and A/C CTO
Hi performance and transistor ignition CTP
Hi performance, transistor ignition and A/C CTQ
Special high performance CTR
Special high performance and transistor ignition CTU
Special high performance, transistor ignition and 4-speed CTV
High performance. 4-bbl carb and Turbo Hydra-Matic CZN
High performance. 4-bbl carb and transistor ignition CRI
454 Cubic Inch Engine CODE
High performance. 4-bbl carb and Turbo Hydra-Matic CGW
High performance and 4-bbl carb CZU
Heavy duty and 4-bbl carb CZL
Heavy duty, 4-bbl carb and Turbo Hydra-Matic CZN
High performance, 4-bbl carb and transistor ignition CRI

Ratio and Type CODE
3.36 CAK
3.08 Positraction CAL
3.36 Positraction CAM
3.55 Positraction CAN
3.70 Positraction CAO
4.11 Positraction CAP
3.70 High performance 350 and close-ratio 4-speed CAS
3.08 Positraction CAT
3.36 Positraction CAU
3.08 Positraction CAV
3.08 Positraction with Turbo Hydra-Matic CAW
2.73 Positraction  CAY
3.36 Positraction with Turbo hydra-Matic CAX
3.55 Positraction  CAZ
3.70 Positraction  CFA
4.11 Positraction  CFB
4.56 Positraction  CFC
3.36 Positraction  CLR

Color CODE
Classic White 972
Monza Red 974
Marlboro Maroon 975
Mulsanne Blue 976
Bridgehampton Blue 979
Donnybrooke Green 982
Daytona Yellow 984
Cortez Silver 986
Otario Orange 991
Laguna Grey 992
Corvette Bronze 993

Tommy Ledberg