What is the difference with \"half years\"? I have an 84 and a half K5 Silverado and I was wondering what exactly, if anything is different. It looks a little more like an 85 to me but for the most part it's ALL 84. It came stock with rear sliders with "wings", A/C, "4 on" high beams, a seperate fuse for a refrigerator or aux. heater, power everything, 31 gallon tank, factory leaf spring lift, factory rear tint, cruise, posi-lock rear end, and dual batteries, and two-tone metal flake paint. I'm just trying to figure out what was stock, what was optional, and what was special order. Unfortunately there are no sights that delve that deeply into it. Any help would be appreciated. It's hard to find parts when you can't just walk in and say "it's an 84 K5"....cause then I get home and it's NOTHING like what I just bought. HELLLLP!