You made out like a bandit there my friend.
Welcome to the forum!
The best thing to do now is to do some tear down and maintenance before you jump on those bad boys & rip up the powder.
1. Carbs > Take them off carefully, (take pics with a digital camera if you have to) take them inside to clean them up. Get some spray carb cleaner & wear some safety glasses, you don't want that stuff in your eyes. Take the bottom bowl off and use lots of cleaner to get rid of any varnish are green crud that may be gumming things up.
2. Clutches > Remove the belt by grabbing the top near the front clutch and pull up and back, that should open up the rear sheaves allowing you to slip it off. Some Polaris clutch lube is a good investment here, but don't use tonnes of it, just enough to get things moving nicely. Remove the center bolt from the rear or secondary clutch & remove it. Use a snap ring plier to remove the sanp ring from the rear of the clutch. Take her apart & check the ramp buttons inside are in good shape, then lube it up & re-assemble.
3. Grease > Before you put the clutch back on, grease the jack shaft (top crossssahft) and drive shaft (bottom shaft that goes through the track). There is quite a few spots to grease on your machine, mostly in the suspensions, wherever there is a crossshaft or steering movement there will be one. Use a good low temp grease.
4. Traction > check your carbides to see if they are still good, replace if needed; check the alignment of your track to be sure it's running true on the sliders.
Best place for tunnel & rail extensions...
http://www.tracksusa.com/rail.html
http://www.tracksusa.com/tunnel.html
These extend the rails WITH the sliders; some only extend the rails & the sliders stay the same length which I think is a completely bogus way to do it.
If you run into trouble or not sure how to remove or replace something, come back here & search for key words; good odds it's been covered in detail here.
WELCOME once again & happy wrenching!