360/F430 cylinder head stud, TTY and need to replace?

If you use your old studs you should retorque the heads after about 500 miles. If you use new studs you do not need to retorque the heads. In either case use the factory torque settings and tightening sequence.

 

I have reused head studs several times. One key point I will add. Pay attention to how much it takes to get the torque. I have had some that torque right on the spec. I have had others that take too many degrees to get what I want. I run them down until compete contact on all nuts. I then watch how many degrees of rotation it takes to achieve the torque for step one. If I have a stud that takes more than others, it gets replaced. Same with the second step of 90 degrees, I use a digital wrench and watch the torque number. If it goes "soft", replace it.

 

I have a stud tool that has a threaded collet you clamp on the stud to removed and re-install. I like them to be hand seated. I feel that if you tighten or bottom them in the hole they tend to bind and "lean". This makes sliding the head on more difficult. I see no advantage in having the threads prestressed by bottoming them.
I also take an old stud and hand cut a cleaning groove and use that as a thread cleaner for the block. I don't want to use a tap and remove any metal.