Starting in 1996, (serial number 138600 and up) they did not give a head bolt torque spec.
Instead, they tell you to oil the threads and the underside of the bolt head.
Then tighten then in sequence till you reach 120 in-lbs, and then give each bolt an additional 1/4 turn.
The sequence, starting with the two center bolts, move in a counterclockwise circle, moving out 1 bolt per revolution.
Connecting rod spec is listed 2 different ways in my 2 manuals.
One says 120 in-lbs, then an additional 1/4 turn.
The other manual says 170 in-lbs.
So double check these numbers before you take my word for it.
Manuals are cheap, mistakes are expensive.