You have to grind down the spindle with the Wilwoods as well.
The spacer issue looks a little worrisome from here ... it looks like there's barely any lug visible the way they are sitting now to clear the caliper, so assuming that the new rotor is about the same place, you're going to need a pretty significant spacer with those rims. As in something bigger than the slide in 1/2 spacers but more like the adaptor spacers with their own lugs. I've always stayed away from those because they put big time stresses on the hub components at the most crucial point of such a heavy vehicle. Plus your rims already stick out a little up front so that would get accentuated, and you'd have to replicate it in the back to have some symmetry.
Anyhoot, that's what it looks like from here in the pic and without the right rotors ... hopefully it will turn out that you can use the slide in spacers or no spacers at all.
The spacer issue looks a little worrisome from here ... it looks like there's barely any lug visible the way they are sitting now to clear the caliper, so assuming that the new rotor is about the same place, you're going to need a pretty significant spacer with those rims. As in something bigger than the slide in 1/2 spacers but more like the adaptor spacers with their own lugs. I've always stayed away from those because they put big time stresses on the hub components at the most crucial point of such a heavy vehicle. Plus your rims already stick out a little up front so that would get accentuated, and you'd have to replicate it in the back to have some symmetry.
Anyhoot, that's what it looks like from here in the pic and without the right rotors ... hopefully it will turn out that you can use the slide in spacers or no spacers at all.