Lowering question

[Nhoechst]

I'm sure this has been asked on here before, so just bear with me. I've got a 72 1/2 ton lwb thats at stock height and riding on 15x8's with 275/60/15 tires. My plan was to put 3" lowering springs up front with 2.5" drop spindles and 4" lowering springs in the back. Before I go through with buying the parts, just wanted to see if I'd run into any problems like one I read that the brake lines need to be longer up front so that the caliper will reach when the suspension is unloaded during travel or jacking up. Also double checking I wont have any tire rub when maxing out the steering. Any input, pics of anything similar, or links to other threads are much appreciated. Thanks guys you're always great help.