I've always thought that cars that were sold new in California back in the day were required to be equipped with A. I. R. . The NCRS shipping report shows that my 1967 L-79 coupe was delivered new to Harry Mann Chevrolet in Los Angeles. The suffix code stamped on the block pad is HT, not HD for A. I. R. . The correct VIN derivative is there. Does this mean I may have a bogus block stamping? 
Rick R.

Rick R.
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