rzr 800 compatability with 900

So I am brand new to the rzr world, I have been stuck with my high HP arctic cats, but wife wanted rzr so I picked up a 08 800 for cheep and have started over hauling it like I do everything. My question is I found a guy with a 2013 rzr 900 with a high lifter 5" lift and 2 sets of gorilla axles for all the way around. So he is selling 8 A arms/control arm and 8 axles and the high lifter lift, will it fit on the 800 and will the axles fit. I have looked on Google and try ed to part number match but can not get a solid answer. Any help would be greatly appreciated