I'm not sure exactly what your working on but it sounds like a "heli-coil" would do the trick. Stop in your local auto parts store and ask them for a "heli-coil" kit to repair the size bolt you have. The kit will supply what is necessary to repair the threaded hole back to original.
It is in a shlp manual from AUTOBOOKSONLINE.COM
No, head bolt torque is much higher than rocker arms.
Boston 3.0 liter engine rocker arm bolt torque specification is 20 pounds. The rocker arm bolts should be torqued in 10 pound intervals.
The correct torque for the rocker arm bolt is 14 N·m (124 lb in) plus 30 degrees.
For the 1989 Chevy S-10 with the 2.5 liter engine, the torque setting for the rocker arm bolt is 22 ft. lbs. The torque setting for the rocker arm cover is 75-inch lbs.
22 foot/lbs
The 1984 258 cubic inch engine rocker arm bolt torque specification is 30 pounds. You should torque the rocker arm bolts in 15 pound intervals.
The 2000 Chevy Impala 3.4 liter engine rocker arm bolt torque specification is 45 pounds. The rocker arm bolts should be torqued in 15 pound intervals.
17 pounds
You torque the rocker arm bolt down and that's it, no adjustment.
Rocker arm stud nut or bolt 17 to 23 foot lbs
89in lbs and then an additional 30 degrees