04 silverado lowering question
 

Hey I'm new here to the forum. I've got a question about a tire size and lowering kit. I'm running a 275/45/20s on my 04 silverado, I was looking into buying a lowering kit. The only thing is I dont want the tire to rub the fenders or the fenderwells. Would a 4-6 drop be too low for the tires or would a 2-4 drop be better? Any suggestions would be appreciated.