you will run into the ABS sensor size issue as your 2011, the 4" spindles only fit up to 2009 i believe. you will also not like how stiff ranchos are, i hated mine and went bilstein while it was a DD, then went to fox when it was for the sand.
also, for 2" rear, use a shackkle, not an add-a-leaf. add-a-leaf's sag, and give a harsh ride, where as shackles actually can improve the ride.
Doetsch makes a 3" spindle that will work for you. also the 4" spindles only give you 3.75" lift.
06 Ranger XLT
5.5 Mid travel w/ 2.0 Fox Resi, Deaver F31 w/ 2.0's
8.8, 4.56's w/ Lock Right and 33's
McNeil Fenders and Bedsides