Re: Any instructions/diagrams on how to install audio in a 67?
Doesn't look too bad but you're not going to be able to fade anything I don't think.
Here is what I would do. It would be a nice little weekend project and would involve pulling the seats out to make things easier.
-Run the speaker level wires (the gray and white pairs) to your stereo dash speaker.
-Put something like a 4 x 60W RMS or so amplifier in the trunk either bolted to the seat back support or upper trunk pan if you don't have a spare and jack....a marine amp will be water resistant if you're worried.
-Use a 15ft RCA cable and run that from your RCA pair down your driver side wiring gutter with the existing rear harness to the trunk. You'll either need a set of RCA y-cables to turn your single set into a pair or use an amp that lets you select four channel mode while using only a single pair of inputs. Typically you want your signal wires away from other voltage sources but I have not had any noise doing it this way with good RCA cables.
-I believe the blue wire is most likely an amp turn on lead so that'll have to be run to the amp as well.
-Run one pair of your speaker wires from the amp back to the front of the car in the driver side wiring gutter with your rear harness and to your kick panel speakers.
-Connect the other set of wires from the amp to your 6x9's.
-You'll need an 8AWG power cable from the battery to the amp if you use one like I mentioned. I've done it a couple of ways. On the last car I drilled a hole below the antenna hole behind the passenger side kick panel, installed a grommet, and ran the fused power cable from the battery -> behind the fender -> through the grommet -> along the passenger side wiring gutter -> into the trunk.
-Clean off a spot on the trunk floor, drill a hole, and use that to ground your amp.
Once you've got everything in you'll need to tune it since you can't really fade anything. One way is to turn your amp gains all the way down and turn your radio volume up 50-70%. Then adjust your amp gains and crossovers up until the sound blends how you want. If it were me, I'd probably go ahead and get a five channel amp and run a 4AWG cable in case you want to add a sub on down the line.
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