Came across this he has 2inch spacers 3 inch spindles on 33s -44 only minoring plastic trimmingOK. I had 33s on 15x12's -60mm offset with around 9" lift and it rubbed my valance clean off the truck. 20s on 33s can mean anything, if they were reps they probably didn't rub. I say go for it.
Minor plastic trimming?