6" Lift, Tire Size Recomendation

^^^^ Yes I have the 3.3L V6. I do believe the 4x4 sits higher unless you had the Desert Runner package. From your pix, it dosent appear to have that package.

With my 3" suspension lift, Measured from the ground to the lip of my front fender it's 36" and the rear measures 38". That is with my Hankook Dynapro ATm RF 10 245/75-16. 30 1/2- 31" equivalent size tire. . What's your ground to fender clearance ? That should give you an indication of how big of a tire you can fit.

If I put on 33" tires today, they would most likely rub the front fender/mud flap with the wheels turned either way. I can clear 32" tires without any mods right now. Here's a few pix of my present clearance. Keep in mind that these cragars have 5" backspacing. My factory wheels had 6" BS. That moved the inside lip of my rim out 1" and the outside 2" out. The further you move the wheel out, the more of a chance you will have rubbing on the mud guard/fender with the outer edge of the tire because it makes a wider sweep when turning. Here's the wheel in two positions.
Turned so it's at the closest point to the fender this on is almost turned all the way to the right

The second pic is how much tread is left on the Hankooks with over 10,000 miles on and off the road. I'd say I still have 3/4 life left on them. The outer edge is a little worn cause I haven't rotated them in a bit. I am very happy with the tires. Good traction in all conditions. Especially in the rain.

LT = If a tire size begins with "LT," it signifies the tire is a "Light Truck-metric" size that was designed to be used on vehicles that are capable of carrying heavy cargo or towing large trailers. This includes medium and heavy-duty (typically 3/4- and 1-ton load capacity) pickup trucks, sport utility vehicles and full-size vans. Tires branded with the "LT" designation are the "little brothers" of 18-wheel tractor-trailer tires and are designed to provide substantial reserve capacity to accept the additional stresses of carrying heavy cargo.

LT = If a tire ends with "LT," it signifies the tire is either an earlier "Numeric", "Wide Base" or "Flotation" Light Truck size designed to be used on vehicles that are capable of carrying heavy cargo and towing trailers (Numeric sizes), use 16.5-inch diameter rims (Wide Base sizes) or are wider, oversized tires designed to help the vehicle drive on top of loose dirt or sandy surfaces (Flotation sizes). This includes light, medium and heavy-duty (typically 1/2-, 3/4 and 1-ton load capacity) pickup trucks and sport utility vehicles. Tires branded with the "LT" at the end of their size designation are also the "little brothers" of 18-wheel tractor-trailer tires and are designed to provide substantial reserve capacity to accept the additional stresses of carrying heavy cargo.