What is needed to install a new radio in a 1994 Dodge Spirit and is there a installation kit?

To install a radio you need a wiring harness for a 1994 Dodge (a Metra 80-1817 from Circuit City is what I used), and an installation kit (make sure it fits a 1994 Dodge Spirit). You'll probably need to splice the wires from the wiring harness to the stereo harness unless you can get find the right kind of connection somewhere.