Actually, I used the custom autosound corvette cassette deck for esthetic reasons and the high end stereo shop pointed that out that I should not expect a great sounding stereo with the older unit. So there's not much I can do there.
I pulled the power antannae as it was bad and installed a stainless steel retractable antannae.
The stereo does not sound bad, it is not as loud as the passenger speaker when the speaker is tucked away like it is supposed to be, but if you pull it out of the corner, it is as loud as the passenger.
That is what is up!
Thanks for your help