Re: 67 L78 Camaro
The M-22 wasn't available until 1968 in the Camaro. Base Trans for the L78 was an M20 and the M21 was an added option. If you look at the passenger side of the main casing at the back lip you will be able to see if there is an ID stamp. The stamp is the code for the trans as it would read on the pop. This will give you the plant, date, etc. If you can get me a picture of the cowl tag I can give you an idea of it being legit or a repop as well.
Good Luck,
Mike
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