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| 28.566 Corvettes were built in 1968. 9.936
Coupe and 18.630 Convertibles. |
| The Vehicle Identification Numbers, VIN were
194378S400001 through 194378S428566 |
| For convertibles, fourth digit is a 6 |
|
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| Type |
Basic |
Basic |
Basic |
Basic |
Basic |
Basic |
| Cubic Inch |
327 |
327 |
427 |
427 |
427 |
427 L88* |
| HP @ RPM |
300 @ 5000 |
350 @ 5800 |
390 @ 5400 |
400 @ 5400 |
435 @ 5800 |
430 @ 5200 |
| Torque RPM |
360 @ 3400 |
360 @ 3600 |
460 @ 3600 |
460 @ 3600 |
460 @ 4000 |
450 @ 4400 |
| Comp. Ratio |
10.0:1 |
11.0:1 |
10.25:1 |
10.25:1 |
11.0:1 |
12.0:1 |
| Bore / Stroke |
4.00 x 3.25 |
4.00 x 3.25 |
4.25 x 3.76 |
4.25 x 3.76 |
4.25 x 3.76 |
4.25 x 3.76 |
| Carburator |
4bbl |
4bbl |
4bbl |
3x2bbl |
3x2bbl |
4bbl |
| In Manifold |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
| Valve Lifters |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
| Exhaust |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
| Oil Capacity2 |
4 Qt |
4 Qt |
5 QT |
5 QT |
5 QT |
5 QT |
| Spark Plugs |
Type 44 |
Type 44 |
Type 43N |
Type 43N |
Type 43N1 |
Type C42N1 |
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| * Limited production engine
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| 1 Models with aluminum
heads use A.C R43XL |
| 2. Add 1 Qt if you put a
new oil filter. |
|
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| 3917215 |
327 CID - 300 HP & 350 HP |
| 3916321 |
427 CID - 390 HP - 400 HP - 430 HP & 435 HP |
| 3953439 |
427 CID - 430 HP & 435 HP |
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| 3917291 |
327 CID - 300 HP & 350 HP |
| 3917292 |
327 CID - 350 HP |
| 3917215 |
427 CID - 390 HP & 400 HP |
| 3919840 |
427 CID - 435 HP ( Iron Head ) |
| 3919842 |
427 CID - 430 HP & 435 HP ( Aluminum Heads
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| 327 Cubic
Inch Engine |
CODE |
| Manual transmission |
HE |
| Power steering and A/C |
HP |
| Special high performance |
HT |
| Turbo Hydra-Matic |
HO |
| 427 Cubic Inch Engine |
CODE |
| High performance |
IT |
| High Performance |
IL |
| Triple Carburetion + High Performance + Turbo Hydra-Matic |
IO |
| Triple Carburetion + High Performance |
IM |
| Triple Carburetion + Special High Performance |
IR |
| Turbo Hydra-Matic |
IQ |
| Triple Carburetion + Special High Performance + Aluminum heads |
IU |
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| Ratio
and Type |
CODE |
| 3.36 |
AK |
| 3.08 Positraction |
AL |
| 3.36 Positraction |
AM |
| 3.55 Positraction |
AN |
| 3.70 Positraction |
AO |
| 4.11 Positraction |
AP |
| 3.70 |
AS |
| 3.08 Heavy Duty Positraction |
AT |
| 3.36 Heavy Duty Positraction |
AU |
| 3.08 Positraction |
AV |
| 3.08 Heavy Duty Positraction |
AW |
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| Color |
CODE |
| Tuxedo Black |
900 |
| Polar White |
972 |
| Rally Red |
974 |
| LeMans Blue |
976 |
| International Blue |
978 |
| British Green |
983 |
| Safari Yellow |
984 |
| Silverstone Silver |
986 |
| Cordovan Maroon |
988 |
| Corvette Bronze |
992 |
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| © Tommy Ledberg |