I noticed that and still think that it's a screwed up way of doing it, even if he used the proper square bolts instead of u-bolts and blocks that would fit better. If GM did it that way, then I'm still amazed it worked as well, for that many years, on as many vehicles as it did before the lowering job happened. Personally, I'd have re-routed the brake lines and I refuse to use blocks to go up or down on a leaf spring vehicle, just don't trust the things.