There is never a car or engine to small to install a stereo into
Yes just go to Walmart and pick up a wire harness for your make and model of your car, also at the same time pick up a spacer for your deck, unless of course the factory radio is the same size (2"x6")
Also check the entenna wire to see if your the lucky one to have Chevy's stupid mini wire, then of course pick up the connecter so it will fit your aftermarket deck, unless of course u dont want the radio then sve urself 5bux and dont buy it. as for the full stereo if you go over a 200watt amp, you will want to buy a compassitor which will run you an extra 50-200bux to your full stereo price.
If you have any questions just privite message me