What is the best way to hold the studs to tighten into the heads. How much torque should I apply. (stock 440 cast iron heads). I cannot find the number in Service Manual or Mopar engine book, and am afraid the 30 ft-lbs called out for nuts is too great because of the small contact area of stud unthreaded surface to head female threads. I do not want to rip out these 40 yr old aged threads. I intended to use Permatex Super 300 sealant. Any thoughts. Help.