I have a standard cab that I built fiberglass pods for the doors, without cutting a huge hole the panel. - 6.5 in the doors 6x9 behind the seats and 2 10" subs (I had a single 10" behind my old bench but the bucket seats I put in it wouldn't fit. So I did something a little different. Pics below.
door fiberglass pods.
2 10"s
This is my new bed interior that my subs sit on. it shows my old single 10 up there that you can kind of see at the back window, I have changed to the two 10"s since this pic. I had to post this pic to represent the terrible towel because I see you are from Pennsylvania, STEELERS baby! \('o'\) . My gramps is from PA.