I think they used bigger bolts this time around. I believe they used a crappy material on the 6.0 for head bolts.
dont know what changes there were...but i think SOME of the
issue w/ the 6.0 was that you had a LOT of customers who came
from the 7.3 platform (and were used to running lots of tuners).
I dont know the 'zact numbers but im pretty sure the 6.0 was pushing
the better part of a 100hp more over the 7.3
at some point youre gonna find a weak point of ANYTHING...7.3 guys
had trans issues.
I dont personally feel the 6.0 needs any more hp...torque maybe but
the thing runs and runs RELIABLY WELL...would i like more HP...absolutely,
im a gear head at heart...but im not willing to sacrifice reliability or
drivablity for another 50 or 100hp.