All of us down here in Az have 35's or 37's, You can clear 35's on a gen 2.5 with just a 2" body lift. I ran that setup for years with no problems and i use 35x13.5 tires on 3.5 bs wheels. Just recently added 2" more suspesnion lift so that i can move up to 37x12.5's.
Here's my 35's with 2" lift at full flex and hardly rubbing (you don't have this much travel so don't worry about rubbing much)
Same truck same day same setup with 40"s and a fair bit of rubbing 5" BS wheels though i think 3" BS and my current lift would be ok for 40's
My wifes old SR 2" BL (green with 35's) next to Lloyds SR 3" BL(dark green with 37's) nevermind the bender
My old Truggy RS with 35's 2" BL
Clay's SWB with 35's and 2" lift
Pat's SWB on 35's and 2" BL
Ryan's SR on 35's and 2" BL
Kevin's Sport with stupid lift and 35's
Pat's other SWB on 35's 3"BL (pre truggy)
Kevin's other SWB on 35's 3" BL 2" suspension