Reading 1970 Chevelle Build Sheets
Blocks 1 through 41
Broadcast Copy sheets, commonly called 'build sheets', are
paperwork that accompanied a vehicle as it was being assembled
showing what components were to be used during construction. These
were not meant to be left in the car once they were no longer needed
at a particular workstation, but rather collected and tossed in the
trash once they served their purpose or removed at the end of
assembly by final inspectors along with anything else that didn't
belong in the car.
I can't stress this enough; it is important to note that not all plants were the same when it came to how information was included on these build sheets. Although most of the blocks of data contain the same broadcast code (letters or numbers) for the same item from plant to plant, there are variations. Even the RPO wording in block 107 will vary from plant to plant for the same RPO and attention to these details is generally what separates an authentic build sheet from a reproduction.
I have intentionally omitted some details about some of these differences and used an asterisk (*) character to indicate there are differences. So anytime a question is asked about a particular broadcast code, the assembly plant must be taken into consideration.
Atlanta and Kansas City build sheets list origin as Lakewood and Leeds as the plants, respectively, this site still refers to them as Atlanta and Kansas City.
Any questions concerning your build sheet can be addressed to me at . Be sure to include the assembly plant and as many specifics about the car that you know. A readable scan or photo of the build sheet in question will also be helpful.
A typical 1970 Chevelle build sheet for a U.S.-built Chevelle has 108 blocks of data pertaining to the assembly of the car. Not all plants used the same build sheet form, some data blocks differ.
All broadcast codes are determined by parts overall required to build it and one option may require different supporting pieces. For example, a Chevelle equipped with A/C and/or power steering would require different brackets, pulleys, etc. from a non A/C or non power steering car.
I have NO good examples of a Flint, MI. sheet so that plant is omitted in the table below due to lack of data. The blocks are generally broken down as follows.
Where there are variations in the way data are depicted in a block, those will be shown with 'variation #1', 'variation #2', etc. Contact me for specifics and be sure to be specific about the block number and the assembly plant.
This section currently under revision...