Bill, I'm pretty sure a member made some, might have only been A-Bodies though.
An issue to watch out for on E-bodies is the close proximity of the dash frame below.

Anyway, you can buy the whole setup here (Custom Autosound) or use one of their dual voice speaker 4x10's - bass is apparently better than the 2x3.5".
But I believe in an E-Body the 4x10 needs a minor mod to the dash frame for the magnet to clear.

One other option is Retrosound They also do a DVC but with a flatter magnet. This is probably the route I will go if I could be sure the frame did not need any mods.

Anyway, that's my knowledge, hopefully of some use