The factory inner skins have dimples where the CSII holes are, from what I recall. Maybe the earlier years won’t have that though. I did this conversion to my 87’ back in 2004. The factory just cuts regular door panels to fit the pods too. I’ll have to look at pics but if buying decent 5.25” speakers they will be too big for the stock plastic brackets anyways. Been 17 years so I might be mis-remembering.