Since you're having fun with me... "all that" amounts to a lot of my own choice vice what I really needed. However, the ONLY things I did to my 2012 which impacted it's load tow/carry ability was add Load Lifter 5000 airbags ($279)and 285 size tires ($800). If you doubt the differences between a 2500 and 3500, go do the same thing I did when told they were near identical. Start checking part numbers for brakes, axles, hubs, etc... you'll find they are the same for the 2500 and 3500.
But we're badly off topic for the OP so...