In the attached video Rich Fallucca of Antique Engine Rebuilders says that they install the studs in the block adding a dab of RTV sealant on the course thread of the stud. He then screws them all the way into the block and backs them off a full turn to allow for 11/2 to 2 threads to extend above the torqued head nut.
https://www.youtube.com/watch?v=N5kDrtTJGsU