Vehicle Description
item number description* VIN 1Z37Z3S409531 The first digit, "1,"
indicated the Chevrolet division of GM. The "Z" is the series,
Corvette. The "37" is the body style, coupe. The fifth digit is the
engine, Z, correct for an 454 car. The sixth digit, "3," indicates
the model year, 1973. The "S" is the plant where the car was
produced, St. Louis. The last five digits are a sequence number so
this is the 9,531st Corvette made for 1973. Body Build Date E08 "E"
corresponds to January and "08" is the eighth day of the month
meaning this Corvette's body build date is January 8th, 1973.
Engine Code T1201 "T" means the engine was build in the Tonawanda,
New York. The "12" is the last month of year and the "01" is the
first day of the month meaning the engine was assembled on December
1st, 1972. This is correct as it precedes the build date of the
car. Suffix Code CWM This means the motor was intended for a 1973
454ci Corvette with a manual transmission, which is correct for
this car. Engine VIN Stamp 409531 The last 6 digits of the car's
VIN, 409531, are stamped on the engine pad and pictured below,
meaning this engine is original to this car. Engine Block Casting
Number 3999289 The engine block has the correct 3999289 casting
number for a 1973 454 Corvette. Engine Block Casting Date K 24 72
"K" is November, "24" is the twenty fourth day of the month, and
"72" is the last digits of the calendar year so the engine block
was cast on November 24th, 1972. Intake Manifold 353015 This intake
manifold is correct and original for a 1973 454ci corvette with a
353015 casting number. Windshield CY "C" denotes the month
November, and "Y" denotes the year 1972, meaning this window was
made in November of 1972. Driver's Window VY "V" denotes the month
December, and "Y" denotes the year 1972, meaning this window was
made in December of 1972. Rear Window CY "C" denotes the month
November, and "Y" denotes the year 1972, meaning this window was
made in November of 1972. Transmission Main Case Casting Number
3925661 This main case is correct and original for a 1973 Corvette
with a M21 Muncie with 3925661 stamped on the housing. Transmission
Tail Housing Casting Number 3978764 This tail housing is correct
and original for a 1973 Corvette with a M21 Muncie with 3978764
stamped on the housing. Transmission Side Cover Casting Number
3952648 This side case is correct and original for a 1973 Corvette
with a M21 Muncie with 3952648 stamped on the housing. Clutch
Housing 389962 This clutch housing is correct and original for a
1973 Corvette with a M21 Muncie with 389962 stamped on the housing.
Transmission Date Code P3T01B "P" denotes that its a muncie 4 speed
transmission, "3" is the model year 1973, "T'" is the month
December, "01" is the first day of the month, and lastly "B"
denotes that its a M21 close ratio muncie. Transmission VIN
Stamping 409531 The last 6 digits of the car's VIN, 410158, are
stamped on the main case of the transmission and pictured below
meaning this transmission is original to this car. Rear
Differential AXW333E1 "AX" Denotes the gear ratio 3.36:1, "W" is
the plant, Warren MI, "333" is the day of year, "E" denotes eaton
positraction, and "1" is the shift. This 3.36:1 Eaton Positraction
differential was made during the first shift on November 29th,
1972.
rpo code description 1YZ37 Corvette Sport Coupe A31 Power Windows
C60 Air Conditioning J50 Power Brakes LS4 454ci V8 Engine M21
Manual Transmission N40 Power Steering QRZ White Letter Tires U69
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