This is what I did. I bought kick panel speakers enclosures for the newer A body's and had to cut them to fit, but they look ok to me. If you don't like black you could paint them as well to match your interior. I might do this still, but for know I am still working on my interior. The one problem I have is the passenger side vent will not open all the way, but for sound I'm willing to sacrifice the passenger coolness for some nice sound.
This is on a 65 Barracuda so it's probably close to your car.
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