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VIN Tag Information
194377S100001 - 194377S122940 (coupe)
194677S100001 - 194677S122940 (convertible)
Digit Definition
1st Division:  1 = Chevrolet
2nd / 3rd Series:  94 = Corvette
4th/5th Body Style:  37 = 2-door coupe, 67 = 2-door convertible
6th Model Year:  7 = 1967
7th Assembly Plant:  S = St. Louis, MO.
Last 6 digits Production Number starting with 100001 - 122940

Engine Suffix ID Numbers
HD: 327ci, 350hp (air injection reactor, manual transmission)
HE: 327ci, 300hp (manual transmission)
HH: 327ci, 300hp (air injection reactor, manual transmission)
HO: 327ci, 300hp (automatic transmission)
HP: 327ci, 350hp (air conditioning, manual transmission, power steering)
HR: 327ci, 300hp (air injection reactor, automatic transmission)
HT: 327ci, 350hp (manual transmission)
IL: 427ci, 390hp (manual transmission)
IM: 427ci, 390hp (air injection reactor, manual transmission)
IQ: 427ci, 390hp (automatic transmission)
IR: 427ci, 390hp (air injection reactor, automatic transmission)
IT: 427ci, 430hp (L88), (manual transmission)
IU: 427ci, 435hp (aluminum heads, manual transmission)
JA: 427ci, 435hp (air injection reactor, manual transmission)
JC: 427ci, 400hp (manual transmission)
JD: 427ci, 400hp (automatic transmission)
JE: 427ci, 435hp (manual transmission)
JF: 427ci, 400hp (air injection reactor, manual transmission)
JG: 427ci, 400hp (air injection reactor, automatic transmission)
JH: 427ci, 435hp (air injection reactor, aluminum heads, manual transmission)
KH: 327ci, 350hp (air conditioning, air injection reactor, manual transmission, power steering)

Block ID Numbers
3892657: 327ci
3904351: 427ci
3869942: 427ci (early production, unknown usage)
3916321: 427ci (late production, unknown use)

Head ID Numbers
3890462: 327ci, 300hp, 350hp
3904390: 427ci, 390hp, 400hp (early production)
3904391: 427ci, 435hp (early production, iron heads)
3904392: 427ci, 430hp, 435hp (aluminum heads)
3909802: 427ci, 390hp, 400hp (late production)
3919840: 427ci, 435hp (iron heads, late production)

Cylinder Head Casting Number:
The cylinder head casting number is usually found on top of the cylinder head in between two valves and the rocker arm studs.

Cylinder Head Casting Date:
The cylinder head casting date is usually found adjacent to the cylinder head casting number. The casting date code is an alphanumeric sequenced number. The first digit is usually a letter which specifies the month that the block was cast. Some casting dates have been found with all digits being numbers, the first of which corresponds to the month.

Cylinder Head Casting Number Month Codes (1st Digit)
A - January E - May I - September
B - February F - June J - October
C - March G - July K - November
D - April H - August L - December

Two main plants were casting Chevrolet engine parts during 1967: Flint, Michigan and Tonawanda, New York.

Example:  Flint Cylinder Head Casting Number - D 19 9

  • D:  Month = April
  • 19:  Casting Day = 19th
  • 9:  Casting Year = 1959

Example:  Tonawanda Cylinder Head Casting Number - D 19 59

  • D:  Month = April
  • 19:  Casting Day = 19th
  • 59:  Casting Year = 1959

Carburetor ID Numbers
Holley R3418A: 427ci, 430hp (L88)
Holley R3659A: 427ci, 400hp, 435hp (front carburetor, rear carburetor)
Holley R3660A: 427ci, 400hp (center carburetor, manual transmission), 435hp (center carburetor)
Holley R3810A: 327ci, 300hp, 350hp
Holley R3814A: 327ci, 300hp, 350hp (air injection reactor)
Holley R3811A: 427ci, 390hp
Holley R3815A: 427ci, 390hp (air injection reactor)
Holley R3888A: 427ci, 400hp (automatic transmission, center carburetor)

Distributor ID Numbers
1111117: 327ci, 300hp (automatic transmission)
1111157: 327ci, 350hp (transistor ignition)
1111194: 327ci, 300hp (manual transmission)
1111196: 327ci, 350hp
1111258: 427ci, 435hp (transistor ignition)
1111141: 427ci, 390hp (early production)
1111240: 427ci, 430hp (L88)
1111247: 427ci, 390hp, 400hp
1111248: 427ci, 390hp, 400hp (early production, transistor ignition)
1111294: 427ci, 390hp, 400hp (transistor ignition)

Alternator ID Numbers
1100693: 327ci, 427ci
1100694: 327ci, 427ci (air conditioning)
1100696: 327ci, 427ci (transistor ignition)
1100750: 327ci, 427ci (air conditioning, transistor ignition, unknown use)