Somewhere in the tech library there is a thing on longer brake lines from I think a '95 Suburban which is what I did, I had to change the nuts at the end of the hard lines up front and put a Tee on the drivers side which if memory serves involved running a thread die over the tee to convert from the 1/8" NPT to 3/8"-24? (whatever 3/8" fine thread is, don't remember right now), been working fine for over 10 years and pretty much only wheeling it...
In the back we stuck a shock bushing between the frame rail and the bracket lowering it down that couple inches, that has also worked just fine...
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