Originally Posted by subzali
It's also recommended to chase the head bolt threads in the block before reassembly. I'm sure you're already getting good help with this project though
It was mentioned to me and probably worth parroting, when you chase the head bolt threads use a thread chase, either a manufactured one or something you make, and not a tap. You don't want to remove any material you don't have to, especially from good threads.
I ended up making my own since all the tooling I had long enough were bottoming taps. I used a long 10.9 bolt, cut 3 slots along the length with a die grinder and ran it through a die to clean its threads. My 22R short block was factory new but I got a few small pieces of debris, although nothing more than dirt and paint.