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Below is a listing of common identification numbers for the 1972 Corvette including engine block, head id, casting numbers and more..

VIN Tag Information
1Z37L2S500001 - 1Z37L2S527004 (coupe)
1Z67L2S500001 - 1Z67L2S527004 (convertible)
Digit Definition
1st Division:  1 = Chevrolet
2nd Series:  Z = Corvette
3rd/4th Body Style:  37 = 2-door coupe, 67 = 2-door convertible
5th Engine:  Base - K, LT1 - L, LS5 - W
6th Model Year:  2 = 1972
7th Assembly Plant:  S = St. Louis, MO.
Last 6 digits Production Number starting with 500001 - 527004

Engine Suffix ID Numbers
CDH: 350ci, 200hp, (emission controls, manual transmission)
CDJ: 350ci, 200hp, (automatic transmission, emission controls)
CKW: 350ci, 200hp, (manual transmission)
CKX: 350ci, 200hp, (automatic transmission)
CKY: 350ci, 255hp, (manual transmission)
CKZ: 350ci, 255hp, (ZR1 - manual transmission)
CPH: 454ci, 270hp, (manual transmission)
CPJ: 454ci, 270hp (automatic transmission, unknown use)
CRS: 350ci, 255hp (air injection reactor, automatic transmission)
CRT: 350ci, 255hp (air injection reactor, manual transmission, unknown use)
CSR: 454ci, 270hp, (air injection reactor, manual transmission)
CSS: 454ci, 270hp, (air injection reactor, automatic transmission)

Block ID Numbers
3970010: 350ci, 200hp, 255hp
3970014: 350ci, 200hp, 255hp, late production
3999289: 454ci, 270hp

Head ID Numbers
3973487: 350ci, 200hp, 255hp
3998916: 350ci, 255hp, unknown use
3998993: 350ci, 200hp, unknown use
3999241: 454ci, 270hp

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 1972: 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
Rochester Q-jet #7042202: 350ci, 200hp (automatic transmission)
Rochester Q-jet #7042203: 350ci, 200hp (manual transmission)
Rochester Q-jet #7042216: 454ci, 270hp (automatic transmission)
Rochester Q-jet #7042217: 454ci, 270hp (manual transmission)
Rochester Q-jet #7042902: 350ci, 200hp (automatic transmission, emission controls)
Rochester Q-jet #7042903: 350ci, 200hp (manual transmission, emission controls)
Holley R6239A #3999263: 350ci, 255hp

Distributor ID Numbers
1112050: 350ci, 200hp
1112051: 454ci, 270hp
1112101: 350ci, 255hp

Alternator ID Numbers
1100543: 454ci, 270hp
1100950: 350ci, 200hp, 255hp
1100544: All with air conditioning.