Little bit of an update...
Got the Amp and speakers wired up, and it sounds GREAT!!! It's super easy to use, bluetooth connects to the phone right away and plays music, even handles the phone calls! I'm pretty pumped to be honest. I love having great tunes and modern amenities, all while keeping a completely factory looking dash.
Here's the speaker mounting bracket I made. I traced the outline of the stock 4x10 speaker onto a sheet of 1/2" plastic from TAP, ($2.15 from their scrap pile) and cut it out, then used a 3 1/8" hole saw to cut out the speaker holes. I ended up using 1/2" spacers to drop the mount lower so the tweeter domes didn't stick up though the top of the metal dash and interfere with the dash pad.
Untitled by
awesome_adawson, on Flickr
Untitled by
awesome_adawson, on Flickr
So the one issue I've had is in wiring up the stock AM-FM radio to the amp. I tried to avoid pulling the radio out, so I pulled out the speaker connection plug from the back of the Delco AM/FM. It looks like this:
Untitled by
awesome_adawson, on Flickr
Not sure what the ABCD refers to, I was hoping I'd see +- signs or at least front/rear left/right... so I guess I have to troubleshoot the plugs and see what works. The Amp has speaker-level inputs, so if I do it properly I will be able to play the AM-FM through the amp and speakers as well.
I was running short on time and had to throw the seat back in, so for now its not hooked up.
I also ordered more boom mat carpet underlay, and a new molded carpet kit from ACC (through RockAuto, $119 +SH, Tax)
Once that stuff arrives I'll pull the seat again and finish up that project.