You need to find the 1971 Options and Accessories report for Challengers.
That is the only information that Chrysler kept on these vehicles. That report gives you only a percentage figure out of all 71 Challengers made that had each particular option. You can't cross reference two options, it didn't worth that way.
Galen Govier most likely has the most extensive registry of all different years and models of Mopars. He's able to use these reports to give you a rough breakdown. Where people sometimes gets confused is he would also give breakdowns based on known examples in his registry....for example he could tell your buddy his car is the only 318 car with the wide chrome option....but what he really means is that it's the only one in his registry.
I don't think Galen is in the business of decoding Mopars anymore for the general public...just too many inquiries