Kahne, one of those "race anything that moves" guys, hasn't raced in a truck series ride since 2004. That year, he ran two races and won both, so yeah, it seems like he's a decent bet to run well.
It's a good move for both parties; Kahne gets to have fun in a new ride, and Kyle gets a proven driver to run for his truck team, which could use a bit of sponsor cash. And hey, if Kasey's not able to secure a ride in Sprint Cup next year, he can always run trucks.
(Hat tip: Catchfence)