Are those factory holes? Normally I see speaker holes that are more like the 6X9 with a pressed in or recessed area that is punched out.
Off hand, and can’t say. Sorry I’m no help here.
Just saying …. IF I was doing a stereo, the 6X9’s would pack a great punch once amplified. Going nuts on more speakers wouldn’t be my route. Just quality parts.
What were some of the FB answers?