You may be cutting it real close on rubbing issues with 34's and a lift. All the searchs I did on mud pretty much said that any bigger than 33's with the OME lift would need a one inch body lift. I stuffed my old 31's, front and rear in the wheel wells on a ramp before buying my 33's (after the lift) then measured and I know for sure that 35's would of rubbed bad. I am running 33's with the OME Heavy and clearance is good. Do a search in the 60's section, lots of info.