Good stereo setup for an A body?

If you want front speakers & don't want to butcher your door panels, you can get kick panels that hold 4x6 speakers ( 1967-1976 Mopar A Body Kick Panel Speakers 4x6" No Speaker ) as an example, or these ( Kick Panels for 1964-69 Plymouth Barracuda )
I have those in my Barracuda and I don’t know how much I can hear them . I mean I can but less than I thought I would.