1973 Q Code Mach 1

I'm looking at picking up another 1973 Mach 1. It is a Q code car, however it currently has a 302 in it. Something I find odd is that it has a vinyl top. I know there was some debate over whether the "3/4 vinyl roof" was a ford option or not. If this was in fact a factory option, does anybody have a guess as to how many Q codes came with the vinyl?
 
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