[RavenTBK]

There really isnt anything when you come from stock. You need to flash a different recovery console first. You can flash recovery without wiping your stock setup. The only issue is if you restore the backup you create, you will overwrite any new stuff that comes with the rom with the stock stuff you backed up.

Now, if you're just worried about contacts, those will be restored automagically when you sign in with your google account once the new rom is in place.