Quote:
Originally Posted by WadmalawJoe
Do you mean to tell me that the writing on the firewall comes from the factory?
![](http://i779.photobucket.com/albums/yy79/jtristen/Chevy/69chevyengine1-1.jpg)
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My 70 C-10's firewall has a "B" in the upper right corner, seen in the picture below for the Baltimore assembly plant.
The "635" was the job number ( or line sequence )
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