I have a 67 muskeg that needs the rubber belting and i plan on using belting from a local supplier (I'm in Texas not alot of snow cat supply places around here and fm what I have read here it should work). My question is what is the hole spacing and over all length of the stock belts (I don't want to use my old ones as a guide... they have a ton of splices in them). It has the 11 tooth sprocket if that make a difference. and what kind of belting would you recommend using. It also it is in need of some tires 4.5x16 and the only ones have found are the Alpine guide at 145.oo plus shipping... I have been kicking around the idea of using some donut spare tires i.e. 125-90-16 which seem to be close the same height of the 4.5x16 do y'all think this would work? any input would be great.... AL Luna