I got my parts in today for the 08 chevy with 5.3 that had the cam/lifter problem.
Looking at the head torque specs on the www and I'm seeing different numbers for the specs.
Some specs call for 22ft lbs + 90*+90* except # 9 and #10 , these would have 22ft lbs +90*+50* (shorter bolts)? (on the 10.9mm bolts)  
Others say all the 10.9mm bolts should be 22 +90*+90*. 
My bolts are all the same length (new bolts)

It is a LC9 engine (aluminum block and heads)
What say you,
John