I installed the rear kits yesterday and thought I would pass on some observations.
A reasonable option to opening up the hat area of the rotor to fit over the hub is to reduce the size of the hub. Since I started enlarging the hat diameter before realizing this option, I ended up doing a combination of both. I think the best answer is doing the hub by itself. I used the same drum sander for the hub as I did for the rotor, and spun the hub by hand while applying the drum sander to maintain concentricity. There is less area on the edge of the hub and it takes less time to reduce it compared to increasing the rotor hat diameter. If I had access to an on the car brake lathe I would investigate rigging it to make this cut. Also if I had access to a machine shop I would investigate machining the hat (just like a miniture brake drum) slightly oversized.
When enlarging the factory caliper slot to accomodate the thicker rotor, I used a grinding wheel similar to the way that Warmonger pictured in the how to. I used a 9" wheel. It was hard to hold the piece. If I were to do this again, I would either try to find a less agressive cutting wheel or find a way to reduce the speed. The wheel cuts very agressively, and would be easier to control if it was either a bit slower or if the wheel were less agressive.
If I had access to a mill in a machine shop I most certainly would have preferred cutting this out instead of grinding it. It would be more precise and much easier to control.
But it is finally done and it looks great. I havn't driven it enough for the pads to seat into the rotors yet so I still need to reserve judgement on how much it helps, but even now the brakes are more agressive than with the large fronts only.
I lost a little pedal firmness which I mostly atribute to the bads not yet bedding in, however I will be bleeding / flushing the system once the rears have had a chance to settle in.
Not only does the car stop much better than it did with stock brakes, it looks more like the high performance car it really is with the larger rotors front and rear.
I mentioned the machine shop options for anyone that does have such access. In my earlier hot rodding days one of my best friends family owned a machine shop and we were able to perform some small projects of this nature after hours or on weekends. I would love to have such access now, but time moves on and friendships drift away.
War, thanks again for seeing this through.
PS I forgot to mention that I ground enough away from the nuckle that I have room to slip a box end wrench over the upper retaining bolt.
