The body lift is very straight forward, the hardest part is removing the old hardware. It gets very corroded under there as I'm sure you probably know. Brake lines are fine, leave them connected when you jack up the body, the coiled up brake lines under the master cylinder will stretch to where they need to be, just keep an eye on it while lifting. The steering shaft doesn't HAVE to be lengthened, will extend far enough. Shifter linkage will work but just, might not be able to line up the gear selector on your steering column (the do-hicky that tells you what gear your in) but thats the worst of it. I would however be concerned with the transfer case shifter becuase it will hit your floor, I blame that as the cause behing my transfer case failure. Cab mounts are designed to last pretty much forever, if they look good leave them, obviously if they look fatigued, replace them. Or just say the **** with it and put in shiny polyurathane mounts anyway. But thats your call, they should be fine though