Radio install help 66cuda

You may have all the wiring you need under there from the old radio. There is a red hot lead from the harness that is hot when the key is on. Your ground can go to a screw fastened to the bottom of the dash. The speakers are blue and green on most aftermarket radios. For the constant hot for the memory you can crimp a spade end on your memory wire and unscrew the fuse box and look on the backside of it. There are a couple spade terminals on the back, one of which should be hot all the time. Just slip your spade end over the terminal and refasten the fuse box. Or you can slide it over one of the fuse blades on the front, you might bump it on occasion though and knock it off!!

Good luck with the project, Geof