I wrote to Mecum about some obvious differences in what was in a vehicle description vs what the vehicles had on them from the factory. In this case, it was obvious. Their reply was "what the owner told them", basically.
It would seem, though, that with all of the seeming research that Gateway and Streetside apparently do for their vehicle descriptions, that somebody would have noticed the glaring issues of engine disparities, then investigated, and possibly made some mention of "customer-added" items? Much less a VIN decode, at the least. I suspect they should have some sales documents with the VIN in their archives?
In the '70-'71 parts book body molding/stripe illustrations . . . the horizontal stripes when the side molding is deleted, they are listed for PM 2-drs, too. Colors were black, white, and gold. Also, the "formal" 2dr roof is termed "Fastback", fwiw.
Y'all enjoy!
CBODY67