Factory?

Hmm, well, lol, they always say never say never ! So, just maybe ...... (and it certainly looks cool)

@michaeldetorrice I'm certainly no 1973 Buick Regal expert - I was a little kid when these where new, but I remember seeing many - all the info I can find strongly suggests that this is not factory.   Someone, along the way, filled in that opera window, which was a standard 1973 Buick Regal feature. 

...now watch IXO make a model of this ONE!   😀 😀 😀 

@jkuvakas This one you posted is one of my few favorite cars from the Malaise era......I love it!

I guess no one knows for sure. Sometimes something isn't true ...... until it is.