The Crew cab is available in all trim lines with both short and long wheelbase.
The King cab is available in XE, SE, and LE with both short and long wheelbase.
The King cab is available in Pro-4X in a short wheelbase version only.
This information comes from both the Nissan website, as well as the 2008 brochure.
Nissan is offering 4 different bed lengths across the board. KC gets 6' 7" and 8' and CC gets 5' 5" and 7' 3"
And for what it's worth... I love my Crew cab Pro-4X long bed!
