Well my friend welcome to the bent nun club.
I just replaced everything and here are the things to look for.
Most likely your nun is junk. My suggestion would be to get a nun for an 07 440x. (Check out jaycox power sports, you can buy doo parts online for a good price)
Next thing to look at is the front motor plate. If it isn't bent I wouldn't worry about it. Also on that front plate is where your lower a-arms attach to. Make sure the weld isn't broken. If it is either replace the front plate (like $38) or weld it together again. Next checks under you’re clutch to make sure you didn't buckle your bulkhead. If you did, you will need to bend this back (not to hard). Also check behind your Can to make sure that side didn't buckle as well.
It isn't to bad to fix, just takes some time to drill out all the rivets. If you plan on keeping this sled I would suggest using stainless steel bolts and stainless steel nyloc nuts to put it back together as it will make the replacement time in the future a lot less and a lot easier.