Rzr 50″ lift kits

Good day guys I have a 2011 rzr 800 50" le and want to put some 27" bighorns on it which actually measure 28" in true height. I have some itp ss 212 wheels for it as well to offset it from the rear engine mount I hope? Lol Anyways am I still going to have to put a lift kit in it for clearance issues on the front floor boards or will I be ok? I haven’t mounted the tires on the Rims yet so haven’t been able to test them. My question is if I do need a lift what’s everyone’s opinion on the Super Atv one vs the Racertech? I’m still new to the polaris world so any input would help greatly. I also looked on Rubber downs site but shows his lift is for 2010 and down in the standard model? One other question would I be able to use my stock axles instead of rhinos for awhile or am I going to have binding issues? Thanks again.