Just bought a 1989 chevy step short bed. I'm redoing the interior door panels seats, radio, cab panels, safety belts, etc. I have been to the junkyard collecting parts. I'm not sure what inner changes. I found a 88 GMC a lot looks like it would work. it had a needle (analog) gauge cluster and my 89 has the funky looking moon dials. will it plug and play? any tips would be helpful! newbie