p1k5 on 32" rear tires. with 1" tall pipe lift. have 16 4x8x16 blocks in the back.. I did ended up with 25 blocks in total, and the tire never rubbed or anything going though the ditch... my 1" tall pipe shock spacer gave me 1.5" of lift... id say 3" of lift with cfab arms, shock spacers, or a bracket lift would allow the rears to be at 32" easy.
i am only showing this because i was worried NOT moving the rear wheels back with the cfab a arms i bought would be a close fit. i was wrong. if a person really wanted to cheap out here they could run super atv front arms only. with 3" of spacer or bracket lift. to slam 32's under there unit. in saying this. with out any load in the unit. me and my cousin up front did get the rear tire to rub. we went through his ditch in his front yard a little fast at an angle. the articulation and speed did cause it to rub. going slow we didn't rub any but that's also with only 1.5" of lift! i think with another 1.5" pf lift no way id rub.. I for sure would have to hit the ditch hard enough to brake me or the unit to rub with another 1.5" of lift.
Also the rock a billys measured out to full size. 32" rock a billys are 32" tall on the unit. off the unit they are actually a little taller. at 8PSI