item
number
description*

VIN
1Z67J5S420131
The first digit, "1," indicated the Chevrolet division of GM.  The "Z" is the series, Corvette.  The "67" is the body style, Convertible.  The fifth digit is the engine, J, correct for an L48 car.  The sixth digit, "5," indicates the model year, 1975.  The "S" is the plant where the car was produced, St. Louis.  The last five digits are a sequence number so this is the 131st Corvette made for 1975.

Body Build Date
F24
"F" corresponds to March and "24" is the twenty fourth day of the month meaning this Corvette's body build date is March 24th, 1975.

Engine Code
V0318
"V" means the engine was build in the Flint, MI plant.  The "03" is the third month of year and the "18" is the eighteenth day of the month meaning the engine was assembled on March 18th, 1975.  This is correct as it precedes the build date of the car.

Suffix Code
CHB
This means the motor was intended for a 1975 Corvette with an automatic transmission, which is correct for this car.

Engine VIN Stamp
420131
The last 6 digits of the car's VIN, 420131 are stamped on the engine pad and pictured below, meaning this engine is original to this car.

Engine Block Casting Number
3970010
The engine block has the correct 3970010 casting number for a 1976 Corvette.

Engine Block Casting Date
C 13 5
"C" is March, "13" is the thirteenth day of the month, and "5" is the last digit of the calendar year so the engine block was cast on March 13th, 1975. 

Intake Manifold Casting Number
346249
The intake manifold is original and correct for a 75 Corvette with an automatic transmission with a 346249 stamping.

Intake Manifold Casting Date
C 13 5
"C" is March, "13" is the thirteenth day of the month, and "5" is the last digit of the calendar year so the intake manifold was cast on March 13th, 1975. 

Distributor
1112888
The distributor is original and correct for a 75 Corvette with an automatic transmission with a 1112888 stamping.

Distributor Date Code
5 B 20
The "5" is the last digit of the calendar year, the "B" denotes February, and "20" is the twentyth day of the month meaning the distributor was made on Februay 20th, 1975. This is correct as it predates the assembly date of the engine.

Starter
1108776
The starter is correct and original for a 1975 corvette with a 1108776 stamping.

Starter Date Code
5 B 27
The "5" is the last digit of the calendar year, the "B" denotes February, and "27" is the twenty seventh day of the month meaning the distributor was made on Februay 27th, 1975. This is correct as it predates the assembly date of the engine.

Carburetor
7045222
This carburetor is correct and original for a 1975 corvette with an automatic transmission and A/C

Carburetor Date Code
575
"57" is the 57th day from January 1st 1975, and "5" is the last digit of the calendar year meaning this carburetor was made on February 26th, 1975.

Transmission Code
75-CK
The "75" is the model year, 1975. The "C" means the transmission was made for a Chevrolet vehicle, and the "K" means is was intended for a Corvette with a 350ci engine, which is correct for this car.

Transmission VIN Stamping
420131
The last 6 digits of the car's VIN, 420131 are stamped on the transmission and pictured below, meaning this engine is original to this car.

exterior color code

10
White

interior color code

65
Medium Saddle

rpo code
description

1Z37
Corvette Coupe

A31
Power Windows

C50
Rear Window Defroster

C60
Air Conditioning

J50
Power Brakes

M40
Automatic Transmission

N37
Tilt and Telescopic Steering Column

N41
Power Steering

QRZ
White Letter Tires

U58
AM-FM Radio, Stereo