Like those monster calipers? Yes I used all factory parts, I bought the calipers refurbished from 4 wheel auto, they were 125 each, exchanged and out of everything I bought I think I got the best deal on them. ohh and as for stopping 36" tires, the calipers look like nothin I have ever seen on a truck 4 pistons monsters already. I also bought a knucle kit from 4 wheel, but I ended up having to buy some toyota factory steel rings for the back of the knuckle, I assume you are supposed to re use the old ones, but mine were a little un usable. The way everything looked when I took it apart, other then brakes nothing really needed it, but it sure is alot nicer now. Buy tons of rags, grease anti seize, and if you are planning on cleaning/painting everything it is gonna be alot bigger job then a re build.
cheers
Eric
BTW I just used diesel to degrease all the parts, then I wire wheeled them, actetoned them and primed and painted them. I also bought all new factory fastners for the knuckle, which was a mistake and don't think I owuld do that again.