I am wondering why limit yourslef to 33" tires??? Stock 20's are 33" and are dwarfed by the Rams large size and wheel wells. Seems I would go minimum of 35's with a level myself.One of the best looking 2500's in my area is a Graphite 4x4 quad with the stock aluminum alloy 17's and 35x12.50x17 and a front level kit with NO badges or running lights(non equipped)......this truck I kept seeing made me lift mine and run 315/70/17's for a little while.
I'm not going down since this truck is stock, My last truck had those tires and I had to do some cutting. Gas prices power loss as well as the other issues that come with 35's are what keep me from wanting 35's. I don't think the stock 20's are 33" but I'd have to measure to make sure. The 2500 is different because the front end is not the same. A 1500 stock can take a bigger tire even thought it is lower. The truck slammed posted has 315's which is like a 34.5 and is about 10.5 wide, big difference in the tire world. It would fit fine but there are only a few companies that make them. I had the BFG's and they are ugly IMO and I was constantly getting them balanced. I'm just trying to figure out what I want to do. I want to keep my ride quality and not damage MPG too much. Thinking possibly lower the rear to level and run 33".