Matching Numbers

A Corvette with matching numbers is different from an original Corvette. An original Corvette will have all the correct numbers and date codes. There's no question about that part of the issue. On the other hand, the simple fact that all the serial numbers match does not necessarily indicate and original Corvette.

Original condition and matching numbers are two totally different statements. It is necessary for an original Corvette to have matching numbers, but having matching numbers is not sufficient for you Corvette to be original.

Every number on every Corvette part ever made has been researched. All the numbers stamped on Corvette parts are known. It's not hard to simply assemble all the correct parts to build any type of Corvette you want.

There are a lot of Corvettes on the market that have been changed to a car that in no way resembles the Corvette that originally rolled out of the St. Louis assembly plant.

VIN The Vehicle Identification Number of your car. From '53 to '60, it is in the driver's side door jam. From '60 to '62, it is on the steering column in the engine compartment. From '63 to '67, it is under the glove box. From '68 to '82, it is in the driver's side windshield pillar.

Casting Number The part number cast into the block when made.  See Engine Block
Casting Date The date of the casting of the block.   See Engine Block
Partial VIN Stamped on the engine pad located in front of the right head. An engine identifier is also stamped here.  See Engine Block.

Casting Number The part number cast into the right side near starter.

Casting Number Part Number cast into the case and tailshaft when made.
Date code Usually the casting date is in the body but this is the case date. The assembly date is stamped in as part of identifier code.
Partial VIN Stamped along top of mounting ear in some, along joint of main case, or on a raised pad in the main body (newer T-10).

Rear End
Date code Cast in drivers side of housing for the case of '63-'79. In straight axle '53 to '62 Corvettes, the identifier is stamped on the front right side. In the IRS, the assembly date is stamped in identifier on the bottom flange.
Gear ratio Stamped in bottom flange as part of identifier as a letter code, such as AW.

Part Number Stamped on top with date and amperage rating.  See Engine Block
Date Code Stamped on top along with amperage rating and part number.

Water Pump
Casting Number  
Casting Date Code Cast on front of the pump.

Part Number Stamped in aluminum, embossed in copper.
Date Code Stamped in Aluminum.

Part number Stamped in aluminum housings and embossed on a tag on iron units.
Date Code Same as Part Number

Window Glass
Date Codes Each window has its own as part of the marking.

Date Code Either on brass tag or stamped in air horn or body, depending on the carb.
Part Number Either on brass tag or stamped into air horn or body, depending on the carb.

Fuel Injection '57-'65
Part Number Stamped on a metal tag on the left front of the plenum.
Date Code  
Serial Number Stamped on side of Plenum for the first hundred or so in 1957 and then were stamped on the metal tag. The serial number does not have to correspond to the car's serial number.

Casting Number Usually cast on top under rocker arms.
Date Code Usually cast on top under rocker arms.

Casting Numbers - When a part is cast, the mold has a part number and a date code set so that it is part of the mold and the part is forever identified. Most older Corvette parts such as heads, blocks, and manifolds, usually have a 7 digit casting number beginning with 3 to identify the part.

Engine Block

On most blocks, the casting number is located on the bellhousing flange behind the driver's side head. The casting number does not usually correspond to any engine part number as the engine part number is for the assembly, not the casting.

Cylinder Heads

The casting number is usually in the area under the rocker arms. Years of baked oil may fill the numbers to make them hard to read. On some heads, partial numbers were found on the intake runners on the block side, such as the 461 and 462 heads.

Intake Manifolds

Usually on the rear runner on top

Exhaust Manifolds

Usually on the outside of the manifold. Small block Ram Horn manifolds usually have this on your left as you view them. The big block manifolds are down the side


Casting numbers are on both the main body and the tailshaft housing, usually on the right side.

Rear End

The casting number is located on the right side near the prop shaft

Water Pump

The casting number is on the front of the body