|
1970 Corvette Registry
Note: Some of the number codes & usage guidelines here have been updated based on the NCRS Technical Judging Guidelines. The former chart was based exclusively on magazine publications. Update: 29 June 2002. |
|
Engine |
Wide Ratio 4 Spd (M20) |
Close Ratio 4 Spd (M21) |
Close Ratio (HD) 4 Spd (M22) |
Auto |
|
|
Base (350
/ 300) |
Std - 3.36
|
Not Available |
Not Available |
Std - 3.08 |
|
|
|
Optional -
3.08 |
|
|
Optional -
3.36 |
|
|
L46 (350 /
350) |
Std - 3.36 |
Std - 3.70 |
Not Available |
Not Available |
|
|
|
Optional -
3.55 |
Optional -
4.11 |
|
|
|
|
LT1 (350 /
370) |
Std - 3.55 |
Std - 3.70 |
Available with ZR1 Option |
Not Available |
|
|
|
Optional -
3.36, 3.70 |
Optional -
3.55, 4.11 |
3.70, 4.11, 4.56 |
|
|
|
LS5 (454 /
390) |
Std - 3.08 |
Std - 3.36 |
Not Available |
Std - 3.08 |
|
|
|
Optional -
3.36 |
Optional -
3.08, 3.55, 3.70 |
|
Optional -
2.73 |
|
|
1970
Corvette Engine Suffixes |
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|
Engine |
Suffix |
||||
|
350/300
(Auto) |
CTG |
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|
350/300
(4 Spd) |
CTD |
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|
350/350
(4 Spd) |
CTH |
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|
350/350
(TI) |
CTP |
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|
350/350
(AC) |
CTJ |
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|
350/350
(AC & TI) |
CTQ |
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|
350/370
(4 Spd & TI) |
CTK,
CTU |
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|
350/370
(ZR1) |
CTV |
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|
454/390
(4 Spd) |
CZU |
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|
454/390
(Auto) |
CGW |
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|
454/390
(4 Spd & TI) |
CRI |
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|
454/390
(Auto & TI) |
CRJ |
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|
Axle Ratio |
Build Sheet Code* |
Axle Code |
|||
|
2.73 |
GU2 |
CAY |
|||
|
3.08 |
GV2, GU4 |
CAL, CAT, CAV, CAW |
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|
3.36 |
GV4 |
CAK, CAM, CAU, CLR |
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|
3.55 |
GV7 |
CAN, CAZ |
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|
3.70 |
GS4 |
CAO, CAS, CFA |
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|
4.11 |
H22 |
CAP, CFB |
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|
4.56 |
HF7 |
CFC |
|||
*
These Axle Ratios are unconfirmed and based on a limited number of build
sheets and GM Published Corvette
Chassis & Body Parts
If you can supply any additional
documentation please contact Juliet.
| 1970 Trim Tag Color Numbers | |
|
Exterior |
Interior |
|
976 Mulsanne Blue |
400 - Black Vinyl |
|
|
|
1970
Corvette Date Codes |
|
|
|
|
Date Codes: Radiator, Surge Tank,
Water Pump & Voltage Regulator |
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|
A = January |
C = March |
E = May |
G = July |
I = September |
K = November |
|
B = February |
D = April |
F = June |
H = August |
J = October |
L = December |
|
|
|
70 or 0 = 1970 |
69 or 9 = 1969 |
|
|
|
Radiator: |
Stamped
top left |
|
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|
Surge Tank: |
Stamped
below "Harrison" logo |
Example: 70F = June 70 |
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|
Voltage Reg: |
Stamped
left side of bracket |
Example: "0A" = January
1970 |
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|
Distributor
& Alternator Date Codes |
|
Glass Date Codes |
|
|
|
|
A = January |
G = July |
9 = 1969 |
N = January |
U = July |
V = 1969 Prod |
|
B = February |
H = August |
0 = 1970 |
X = February |
T = August |
T = 1970 Prod |
|
C = March |
J = September |
|
L = March |
A = September |
|
|
D = April |
K = October |
|
G = April |
Y = October |
|
|
E = May |
L = November |
|
J = May |
C = November |
|
|
F = June |
M = December |
|
I = June |
V = December |
|
|
Examples: |
"LT" = Mar 70 |
"CV" = Nov 69 |
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|
Alternator: |
Example -
"9J18" = 1969 September 18 |
Stamped: |
-
"LOF" (Libby-Owen-Ford) |
||
|
Distributor: |
Marked the
same as the alternator |
|
-
"AS1" on the windshield |
||
|
|
|
|
|
- "AS2" on all other glass |
|
|
|
|
|
|
(AS =
American Standards) |
|
| Examples of "Number's Matching". ECS=Evaporative Emissions Control System (NA9 California Emissions) | |||||||
|
ITEM |
350/300
MT |
350/300
Auto |
350/350 |
350/370 |
350/370
- ZR1 |
454/390
MT |
454/390
Auto |
|
Engine
Block |
3970010 |
3970010 |
3970010 |
3970010 |
3970010 |
3963512 |
3963512 |
|
Engine
Suffix |
CTD |
CTG |
CTH |
- |
- |
CZU |
CGW |
|
Engine
Suffix with AC |
- |
- |
CTJ |
- |
- |
- |
- |
|
Engine
Suffix with TI |
- |
- |
CTP |
CTK,
CTU |
CTV |
CRI |
CRJ |
|
Engine
Suffix with TI & AC |
- |
- |
CTQ |
- |
- |
- |
- |
|
Cylinder
Head |
3927186 |
3927186 |
3927186 |
3927186 |
3927186 |
3964290 |
3964290 |
|
Exhaust
Manifold Driver Side |
3846559 |
3846559 |
3846559 |
3872765 |
3872765 |
3969869 |
3880827 |
|
Exhaust
Manifold Passenger Exhaust Manifold Passenger(Late) |
3932465 3989036 |
3932465 3989036
|
3932465 3989036 |
3932461 - |
3932461 - |
3880828 - |
3880828 - |
|
Intake
Manifold |
3965577 |
3965577 |
3965577 |
3972110 |
3972110 |
3955287 |
3955287 |
|
Alternator
- 42 Amp |
1100901 |
1100901 |
1100900 |
- |
- |
1100900 |
- |
|
Alternator
- 61 Amp |
- |
- |
- |
1100884 |
1100884 |
- |
- |
|
Alternator
- 61 Amp & AC |
1100884 |
1100884 |
1100884 |
- |
- |
1100884 |
- |
|
Distributors |
1112020 |
1112020 |
1112021 |
1111491 |
1111491 |
1111464 |
1111464 |
|
Bellhousing |
3899621 |
3899621 |
3899621 |
3899621 |
3899621 |
3899621 |
3899621 |
|
Coil |
1115238/238
BR |
1115238/238
BR |
1115238/238
BR |
1115207 |
1115207 |
1115238 |
1115238 |
|
Voltage
Regulators |
1119515 |
1119515 |
1119515 |
1119515 |
1119515 |
1119515 |
1119515 |
|
Carburetors
(Early) |
7040203 |
7040202 |
7040207 |
3972121
(Holley) |
- |
7040205 |
7040204 |
|
Carburetors
(Late) |
7040213 |
7040212 |
- |
- |
- |
- |
- |
|
Carburetors
(ECS, Early) |
7040503 |
7040502 |
7040507 |
3972123
(Holley) |
- |
7040505 |
7040504 |
|
Carburetors
(ECS, Late) |
7040513 |
- |
- |
- |
- |
- |
- |
|
Fuel Pump |
40769 |
40769 |
40769 |
40709 |
40709 |
40770 |
40770 |
|
Radiator Radiator (w/ AC) |
Aluminum Copper |
Copper Copper |
Copper Copper |
Copper - |
Aluminum - |
Copper - |
Copper - |
|
Surge
Tank Surge
Tank (w/ AC) |
Aluminum None |
None None |
None None |
None - |
Aluminum - |
Aluminum Brass |
Aluminum Brass |
|
AC
= Air Conditioning |
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|
TI
= Transistor Ignition |
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