Aftermarket stereo installation

Here's the diagram for the radio. This is the only version they show. There's nothing that uses a remote amp from the factory, so you don't have to worry about that.

If you find this hard to see, I can cut into two pieces and enlarge them for you, or you can and paste it into an MS Word typing program where it can be expanded larger.

Can't help with that car. The only thing they have for a '76 model is vacuum hose diagrams. You might try looking for a manufacturer's paper service manual on eBay. Chilton's and Hayne's manuals usually don't include electrical diagrams.