First off, welcome to the sight.

I offer the suggestion of staying away from Calmini. They make a good product(although a good portion of their kit is unnecessary) they are HORRIBLE to deal with, and the lead times on their kits are ridiculous. They may tell you they can ship it out withing a week, but in reality you will most likely end up waiting 2-4 months for the kit to show up.

WIth that said, I would highly suggest Matt at Indy4x. www.independent4x.com He is active on many of the boards and offers top notch customer service. His kit is more simple, however it is the parts that are needed or recommended, not a bunch of parts that aren't needed.

As for tire size, you will be able to fit a 265/75/16 or a 32x11.5x15. You will require a little trimmin at the base of the front wheel wells to reduce rubbing, although you will probably rub a litle at full lock and compression.

Again, welcome, and check out Matt at Indy4x..and if you have any more specific questions he is a good resource.