Re: decoding protecto plates
Depending on which plant it came from, if it has an L on the lower couple of lines (options codes) that indicates a wide ratio 4 spd. Some plants didn't put the option codes on the trim tag.
The 1965-66 Full Size Chevrolet club is the source for the code. I believe they also apply to Chevelles.
Paual
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PaulD
'64 R-Code Mercury
'62 421 SD Catalina
'66 L72 Impala SS
'66 R-Code Fairlane
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