I have a little more time now. It's good practise to check the threads in the block to see that they are all clean.
No don't put a thread tap through them. I count the turns the stud goes down so they are all in an equal depth
when seated just firmly by hand. If I remember correctly I think it was sixteen turns.
Use the correct assembly grease on the threads and the clamping surfaces.
Do you know the correct procedure with the torque wrench ?