One requirement that is absolutely necessary when settling fire-rings is the hot re-torque process. After the first heat cycle, all head studs need to be retightened to the 150 ft-lb specification. It’s not uncommon for most nuts to require a quarter to half a turn. The hot re-torque process is as follows: 1) Idle the truck up to operating temp (allowing the thermostat to open), 2) Shut the truck off and promptly tear down until all head stud nuts are accessible, 3) Re-torque all head studs to 150 ft-lb. Notice the intake rockers have to be removed to access the head studs during a hot re-torque, while the exhaust rockers don’t.