Thats what I did, With a set of 9 inch wheels. I didnt buy the wheels form tehm though, I thought that 120 per wheel was a bit much. bought a set of black plastics, (that I think look better then the alunimun wheels) from my dealer, he got them from WPS.
Just did this switch on my mod. Went from 159 x 2" 2.52pitch to a 162 x 2.5" 3.0pitch.
Used 8 tooth extros plus a Mountain Machines freedom axle with Fabcraft 8" wheels. Worked perfect. Keith.
Not sure what your intent is going to the 162....if you do a bigwheel kit you will end up with a little less track on the ground then the 159. Or maybe you just found a good deal on a track-