New audio in C4
 

Good day.
I'm doing new Audio in an 86 with the BOSE system.
Already has an aftermarket HU but still has the original BOSE fronts and rears.
Was going to do new Polk Audio speakers in the doors and rear but wonder about the front door enclosure and how I can keep or modify for new 6.5" speakers.
Would also love to do a 10" sub in the passenger compartment behind the seat. Have read old posts regarding this. Does anyone know who could build one for me or give me more insight and pictures? I'm having a difficult time getting newer info and pictures.

Thanks