I've got a '71 SS with stock kick panels (not ventilated or anything like that), and I really want to add speakers to my kickpanels, as I've already got big speakers in my hat deck and an amp in back, and need to balance the sound. I want to put speakers in my kick panels, is there anyway to cut them for the speakers and make them fit? I would say they are maybe 4-5 inches deep, and that's what I'm concerned about, if they can fit. You can buy new kick panels w/ speakers for $129/ea from Ground Up or whatever, but that is really pricey when you've got perfectly fine kickpanels and really good speakers! So any input is much appreciated, thanks!