Hi,
the studs can usually go in hand tight as above. sometimes
you have to double nut the stud and run it down to the shoulder.
loctite is okay. on the upper studs the hole goes thru to the
valve spring area. the short end of the stud , therefore, must
be installed into the head. make sure that the stud doesn't touch
the spring. this may sound goofy but i have seen many studs
that were rubbing on the spring.
good luck
stone