Suggestion for the antenna. Autozone sells a powered antenna that mounts on the windshield. Three wires come out of it, 12v+, antenna plug and ground. Replaces your current one. I don't have an antenna on my roof and this works perfect. 20 bucks, can't go wrong with that!! I can post pics if you want. Mounted mine on the dot matrix at top center of of the windshield and also has a light on it to let you know it's on.
I wired the 12v source to the fuse panel for the radio fuse, grounded it on one of the roof screws that hold the metal frame up for the dome light.