i was wondering if a 162 skid out of a 2007 m7 will fit in my 2004 900 1m. And is this a better skid than my stock 159 skid. I am looking to change out my 159 2 inch 15 wide track to a 162 2.5 16 wide track . should i put on 7 tooth external drivers with that track and will that track fit in my tunnel. the 162 2.5 track is a 3 inch pitch. any thoughts would be nice.