Posted by Ark68SS on January 02, 2020 at 22:14:22 from (174.53.39.12):
In Reply to: numbers matching? posted by 47fivewindow on January 02, 2020 at 06:41:54:
I restored a '68 Chevelle SS396. The original restoration was paint/interior/mechanical rebuild/get it running to have fun. In 2004 I attended Chevelle-a-bration which was like the National Chevelle show. That's when I learned about "matching numbers" and decided to build my car to that standard. The car had almost all of its original parts, but over the years some had been replaced.
Many of the assemblies and parts on cars of that era have stamps that show the date the item was built, usually an alphanumeric code using letters for the month and numbers for the day. To be a numbers-matching part it needs to be built from 1 week to 2~3 months of the date of the car's manufacture. Some options that were not made in large numbers could be earlier. Engines and transmissions of GM products were stamped with a partial VIN that should match the VIN of the car. Engines were also stamped at the assembly plant with a two letter stamp that indicated the displacement, HP rating, and transmission application. These are the numbers that are frequently "restamped" by unscrupulous builders to add perceived value to the car.
Searching for and finding the parts I needed was a lot of fun for me. Not as much fun as driving the car to all the shows and meeting folks and seeing their cars. I guess that numbers matching added a little to the value of the car when I sold it, but it was mostly the quality of the build that brought the $$$. :)
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