I purchased the Scarebird kit and have been installing it. The ID on the rotors (ones listed on their parts list) are too small to fit over the hubs they sent, so I'm machining them slightly to fit. No big deal, but something they should have known about.
I bought some 5 on 4.5 to 5 on 5 wheel adapters also, so I can use the stock 3/4 ton wheels and hub caps. I end up with plenty of room inside the fenders. The wheel adapters are 1-1/4 inch thick.
Still haven't mounted the calipers, not until I can install the rotors.
I also purchased a Toyota master cylinder that is a bolt in. I might need to shorted the push rod (information from someone who has done this already), but that give me the double circuit master...disk front, drum rear.
I'll need to do some plumbing of the lines, but we've all done that before.
Can't wait to get the front done and have the truck back on it's tires again. Then, it's on to the rear axle.