This winter I installed a new Retro Sound Zuma radio, 4 6" Polk Speakers, 700 amp JLAudio 5 channel and a 6.5 sub in the stock rear speaker hole. I built my own fiberglass stand offs for the bottom of the doors and ran all the wiring through the stock factory cut outs if the car had had electric windows, I built rear speaker boxes that are a copy of the arm rests in the back seat and covered them in factory material, the sub is in a tiny little box that hangs from the rear deck. I also added sound deadening from the firewall to the tail lights, in the doors and front quarter panels and new carpet.
This was a great upgrade radio works great, gets good reception even in the mountains and the sound deadening made the car much quieter.

 

Looks like you did a nice job. I am thinking of using Polks in my '71. How do you like them?

 

I like Polks, have had them in 3 different cars, they last a long time and sound good.

 

Looks nice! I'm older deaf guy, probably from blasting music and the jet engines when I worked on airplanes, LOL.