would sc10 II fit into 1997 formula 500. If so where could i get a good used one?

I know the suspension on that sled pretty well.... Front and Rear. If you upgrade the skid and can ride pretty well you can hang with the big dogs on the trails that are tghter and some twisties. It is a quick little sucker, not fast... but definetely quick. If you want fast, ie. 100+ mph, you gottat get a bigger sled

CLICK (http://www.snowmobileworld.com/feature_story/doosusupg/index.php)

You can also do this, but I like the upgrade better CLICK (http://cgi.ebay.com/ebaymotors/AD-Boivin-ETS-Ski-Doo-SC-10-Rear-Suspension-Upgrade-Kit_W0QQitemZ270057761025QQihZ017QQcategoryZ100462 QQssPageNameZWDVWQQrdZ1QQcmdZViewItem)