30.464 Corvettes were built in 1973. 25.521 Coupe and 4.943 Convertibles.
The Vehicle Identification Numbers, VIN were 1Z37J3S400001 through 1Z37J3S434464
For convertibles, third digit is a 6
4.000 vehicle identification numbers were not used
Fifth digit varies as follows: J=350 CID 190 HP / T=350 CID 250 HP / Z=454 CID 275 HP

Cubic Inch 350 350 454
HP @ RPM 190 @ 4400 250 @ 5200 275 @ 4400
Torque  RPM 270 @ 2800 285 @ 4000 395 @ 2800
Comp. Ratio 8.5:1 9.0:1 8.25:1
Bore & Stroke 4.000 X 3.480 4.000 X 3.480 4.251 X 4.000
Carburator 4bbl Rochester 4bbl Rochester 4bbl Rochester
In Manifold NIY1 NIY NIY
Valve Lifters Hydraulic Hydraulic Hydraulic
Exhaust NIY NIY NIY
Oil Capacity 4 QT 4 QT 5 QT
Spark Plugs R44T R44T R44T
1 = No Information Yet

3970010 350 CID - 190 HP & 250 HP
3999289 454 CID - 275 HP

3998993 350 CID - 190 HP
330545 350 CID - 250 HP
353049 454 CID - 275 HP

350 Cubic Inch Engine CODE
190 HP with 4-Speed CKZ
190 HP with 4-Speed (California) CLB
190 HP with Turbo Hydra-Matic CLA
190 HP with Turbo Hydra-Matic (California) CLC
250 HP with 4-Speed CLR
250 HP with 4-Speed (California) CLS
250 HP with Turbo Hydra-Matic CLD
250 HP with Turbo Hydra-Matic (California) CLH
454 Cubic Inch Engine CODE
270 HP with 4-Speed CWM
270 HP with 4-Speed (California) CWT
270 HP with Turbo Hydra-Matic CWR
270 HP with Turbo Hydra-Matic (California) CWS

Ratio and Type CODE
2.73 Positraction AV
3.08 Positraction AW
3.36 Positraction AX, LR
3.55 Positraction AA
3.70 Positraction AB
4.11 Positraction AC

Color CODE
Classic White 910
Silver 914
Medium Blue 922
Dark Blue 927
Elkhart Green 947
Yellow 952
Metallic Yellow 953
Mille Miglia Red 976
Orange 980

Tommy Ledberg