Just as the title says hoping to pick up a '12 lariat with 104,xxx and I would really like to upgrade some things on it. First is going to be suspension, not a real sure how the leveling kits work on this since its coils and not the pucks. Could i get 2.5 coils and blisteins and it will be level or does it stack on each other? It has a front end replacement so I'll want it leveled and a better ride. Next is that it is a lariat but no heated or cooled seats. Could I just get the buttons that go on the dash or do I need to find the seats that have the heater & cooling packs in them? Last, are the tailgates with back up cams plug and play? I most likely buy an pioneer headunit. Here are pictures of it.