I got the OEM Side Steps from Diesel Freak. I have been very impressed with the quality of construction. They are the perfect height for my 32"s with no lift.
From the top of the OEM Step to the Bottom of the Floor is FOUR Inches. (Probably No Enough)
You are in a Catch 22 situation. You need the step low enough to do some good getting in, but not low enough to knock it off wheeling.
You may need to do some calculating on exactly how high the door opening will be off the ground, with the Lift PLUS the Tall Tires. You might need a Six or Eight Inch Step to do some good.
My Dog rides in my Roxor. He thinks he owns it. If I were having a step fabricated I would have a solid step made from Tread Plate that my dog could not get a leg through. So far that is the only down side to the OEM Tubing Step. No problem so far, but I keep a good eye on my dog when I can.
A thought would be a step suspended on Steel Cable like on some heavy equipment. A cable suspended step could impact something on the trail without being mangled. Just something to think about.
Good Luck, and keep us posted. We will need a very good report on THE 2.7L TUNE.
Also keep us posted on the 4.10 Gears, Tires, Lift, and Side Step.
Bob R