Hello,
As a former 1990 Corvette owner, the first thing I would mention is to go to the Corvette Forum. they have an audio section w/ many builds, including my old one (same name).
As for some advice, The problem w/ good sound in a C4 Corvette is that the speakers are down on the floor. The first thing to do is to create pods for your tweeters, so that you can "raise" the sound
stage. If you are not sure how to do that, just do a search on CF, or over at DIYMA. The next thing is to move the midbass speakers up front. You can mount them Where you now have the tweeters. or cut a
hole in your door panels for them. Again, the best thing is to raise the sound stage.
You can then mount 8" subs in the rear speaker compartment. You will have to make speaker baffles for the sub's.
Please let me know if you have any questions.
https://www.diymobileaudio.com/threa...er-pods.53732/
https://www.corvetteforum.com/forums...audio-faq.html
https://www.corvetteforum.com/forums...-welcomed.html
Take a look through this. you can get some great ideas.
Randy