I got my 75 that I will be selling soon. I believe it is numbers matching but need to verify. Big question!

Thats right, how.

Thanks for any help or info.

 

I still need to Go over the numbers on my vette I just bought, as a no numbers car from a guy who didnt even know what numbers were. Im hoping its not a numbers car so I can mod it, if it is I might feel obligated to restore it!

anyway heres a link
http://www.geocities.com/MotorCity/D.../matchnos.html

 

A portion of your VIN (last five digits, I believe) will be stamped on the front of the engine on the passenger side where the heads meet the block. There is a metal pad there and the number should be there.
Also, if it is a 4 speed, the transmission will also have the last few digits of the VIN stamped into the transmission case. I don't know the exact specifics of the 1975 model as my numbers matching car is a 68.
Matching numbers also means that all the parts like intake manifold, exhaust manifold, water pump, heads, block have the correct part numbers (not VIN) and date codes for the specific vehicle in question. However, to most people, numbers matching just means that the engine (and trans) has the VIN stamped on it.
Some 75 owners will know more about this than I do but there are lots of parts that have numbers and date codes and must fall into a certain date range to be a TRUE numbers matching car. Date codes should be within 6 months prior to build date. Obviously, if a date code is AFTER the build date it was not part of the ORIGINAL car but replaced later.
Hope I haven't confused you.
I just went through all this with my 68 to verify that what is on the car is original and was not added after the fact, by the prior owner before I purchased the car.
Kurt

 

Corvette automatic transmissions are also stamped with a partial VIN; they have a data tag on them.

On the pad at the front of the right head, you will find two stamped numbers, one with characters a little larger than the other. The larger number is the engine code and was stamped at the engine assembly facility the date the engine was assembled. It will be something similiar to V0101CHA. V indicates the Flint, Michigan engine assembly plant. All Corvette small blocks were assembled at Flint, then shipped to St. Louis before assembly of the Corvette began. The 0101 stands for the calendar date the engine was assembled. CHA is the engine identification suffix and will specifiy the application for this particular engine. Engine suffixes are listed in The Corvette Blackbook and other reference works.

The second number is the vehicle ID number and will contain part of the VIN. This number was stamped at St. Louis while the car was being assembled. The same numbers, using the same tool, were also stamped on the frame in two places, and the transmission. The format should be 1SXiiiiii. 1 indicates Corvette; S is the plant code for St. Louis; X would be a number for the year of production (last character only); iiiiii would be the six digits of the consecutive unit number.

Take notepad, pen, and flashlight with you and check the stamps on the engine pad. Things can get dirty there, so you might want to take a rag or a scotchbrite pad with you when you go.

Open the driver's door and jot down the codes off the trim plate. These will identify the original exterior paint color, original interior trim color, and the time/build date.

 

Thanks everyone I will check this out later this week and get back with you!

 

my 71 big block is not numbers matching, but it is date coded correct, and has numbers stamped on the pad. the block was changed during its first year of life. what are the numbers for? it should have been a warranty replacement, I dont remember the exact date code on the block but it was less than 12 months from when the car was built. either that or somone put a rebuilt block in later and just happened to get one that was date coded correct. the heads and intake are dated two days apart and I think they are original.