[pbhammes]

I was sanding the lower rocker panel of my 66 Chevelle convertible, and noticed the bottom of each rocker panel had the stamped numbers 13617 Z 06 L They are located below the passenger floor pan on the bottom side of the rocker panel. The car seems to have all of its original sheel metal. Is this normal or should I be concerned?

 

[LOVE66SS]

I Found The Same On All Three Of My 66 Convertibles

 

[66 MYSTERY CHEVELLE]

Just part Numbers, not VINs.. no worries

 

[elcamino]

metal stamping plant, model and date codes.

Think about it for a minute, how would they id parts if not for stamped codes?