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Old 05-18-2006, 12:41 AM   #1
Flagstaff_Vette
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Member Since: Apr 2006
Location: Flagstaff !!!! baby AZ
Default 1968 VIN Codes (part of a series)

Please Note – this is NOT going to be 100% accurate. Numbers changed, I coulda mis-typed, but this is the best I can do as a back yard mechanic to help you out. This came from 3 different books, and I tried to put all 3 into one page for ya. Please look for the book CORVETTE BY THE NUMBERS for more accurate information. Thanks.

1968 Corvette Basics:
Base Engine
L75 327 V8, 300 HP 10.25:1
Optional Engines
L79 327 V8, 350 HP 11.0:1, 5 main bearings, Hyd Lifters, HP Cam
L36 427 390 HP
L71 / L89 427 V8, 435 HP, 11.0:1, Alum Heads, 3 Holley 2 Barrel Carbs
L88 427 V8, 560 HP, 12.5:1, Ultra Hi-Performance Cam

DECODING THE VEHICLE IDENTIFICATION NUMBER

VIN # is stamped on the inside of the A pillar windshield.
Convertible Vin #’s were 194678S100001 TO 194678S128566
Coupe Vin #’s were 194378S100001 TO 194378S128566
Symbols, Letters and their meaning:
1st Chevrolet
2nd and 3rd Body Series (94 = Corvette)
4th and 5th Body Style (67 = Convertible, 37 = Coupe
6th Symbol indicates Year (8 = 1968)
7th Symbol indicates Assembly Plant (S = St Louis)
The last six symbols are the production numbers.

1968 – 1978 Corvette Trim Tag ID
Upper right corner is body build date
A = Aug 1967
B = Sept 1967
C = October 1967
D = November 1967
E = December 1967
F = January 1968
G = February 1968
H = march 1968
I = April 1968
J = May 1968
K = June 1968
L = July 1968
M = August 1968
The Second and Third numbers were the day of the month that production of this car started.

On the left side is a word TRIM followed by the following:
STD = Black
407 = Red
411 = Blue
414 = Bright Blue
425 = Orange
435 = Tobacco Brown
442 = Gunmetal Gray
402 = Black Leather
408 = Red Leather
415 = Blue Leather
426 = Orange Leather
436 = Tobacco Leather.

Just right of that is the word PAINT followed by the following:
900 = Tuxedo Black
972 = Polar White
974 = Rally Red
976 = LeMans Blue
978 = International Blue
983 = British Green
984 = Safari Yellow
986 = Silverstone Silver
988 = Cordovan Maroon
992 = Corvette Bronze

ENGINE CODES
1968 and 1969 consist of 7 characters:
1st is Assembly Plant
2nd and 3rd are Assembly Month
4th and 5th are Engine Code Suffix

Assembly Plants (Some engines produced at some plants were used in other cars.)
F = Flint Motor Facility (No Corvette Engine this year from this plant)
K = McKinnon Industries (No Corvette Engines this year from this plant)
S = Saginaw Service (No Corvette Engines this year from this plant)
T = Tonawanda
V = Flint Engine Plant High Performance

Engine Code Suffix ID’s
Code, Cubic Inches, HP, Transmission and Options
HE, 327, 300, Man Trans, Rochester 4 Bbl
HO, 327, 300 THM400 Auto, Rochester 4 Bbl
HP, 327, 350, Man Trans, Rochester 4 Bbl, A/C, P/S
HT, 327, 350, 4 Speed Man, Rochester 4 Bbl, Special Cam
IL, 427, 390, 4 Speed Man, Rochester 4 Bbl, Hyd Lifters
IQ, 427, 390, THM400 Auto, Rochester 4 Bbl, Hyd Lifters
IM, 427, 400, 4 Speed, L36 Engine, Holley 3X2 Carbs
IO, 427, 400, THM400 Auto, L36 Engine, Holley 3X2 Carbs
IT, 427, 430, M22 4 Speed, Holley 4 Bbl, Special Cam
IR, 427, 435, 4 Speed, Mechanical Lifters, Holley 3X2 Carbs
IU, 427, 435, 4 Speed, L71 Engine, Aluminum Heads (Also used for L88)

Corvette Engine Blocks (You may have a different block, if so it might be from another Chevy Vehicle)
3914660 327ci, 300 HP, 2 Bolt Main
3914678 327ci, 300 & 350 HP, 2 Bolt Main
3916321 427ci, 390 HP, 2 Bolt Main – This block only used until January 1968
3916321 427ci, 400, 430 & 435 HP 4 Bolt Main – This block only used until January 1968
3935439 427ci, 390 HP, 2 Bolt Main – This block made after January 1968
3935439 427ci, 400, 430 & 435 HP, 4 Bolt Main made after January 1968

Cylinder Head
3917291 327ci, 300HP, 1.94 intake 1.50 exhaust 63.305 cc
3917291 same as above with 2.02 intake 1.60 exhaust (late production) 63.305 cc
3917215 427ci, 390 & 400 HP, 2.06 intake 1.72 exhaust oval port 100.967 cc
3919840 427ci, 435 HP, L71 Engine, 2.19 intake 1.72 exhaust 106.8 cc
3919842 427ci, 430 HP (L88) and below
3919842 427ci, 435 HP (L89) 2.19 intake 1.72 exhaust, 106.8 cc Aluminum Head
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Old 05-18-2006, 12:41 AM
 
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