Taking an educated guess the truck is somewhere in the mid 9000lbs range actual.
My buddy has a 12K lbs rated two post he uses for his '14 2500 CTD 4X4 8' bed. I'd pay attention to the width of the hoist, there's not much room putting SRW trucks on the hoist between the posts, you wouldn't be able to drive through with a DRW.
Make sure you use safety jacks under the truck while working on it.