stealthperf

I was thinking of installing a 2/4 lowering kit in my 2004 2500 Silverado 4x4. Anything I should know or look for? Any recommendations? I was looking at the lowering kit that comes with the front and rear perches and hangers, they said it keeps your pinion angle in line better instead of tipping the pinion by just doing the rears.
Drop torsions in the front. I don't want to go super low, just Silverado ss looking height. Also doing traction bars and heavy duty tie rods and pitman arm braces for 4x4 launches.
Any negatives to lowering? I just want to make sure I know what I'm getting into. This is for street only. I don't off road at all.
I asked this on the 8 lug section but didn't have much luck. Thanks, Dave.