Do a compression test before pulling it apart to identify problems.

Replace the valve seals. Intake and exhaust seals are different, sort them and show the machine shop if going that route.

Stuff the timing chain cavity with clean rags to prevent uninvited drop-ins.

Using a new OEM hose...put a new hose on the water pump between the water pump and the head before re-installing the head. Put a note in a visible place to do this, you will not be happy if you forget!

And, turn off your phone, radio and TV, take a break and then have a helper watch/monitor the torquing sequence. Using paint mark the 12 o'clock position of each head bolt before starting the 1/4 turn angle torquing procedure.

Good luck!!!

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"Rudeness is a weak man's imitation of strength" - Eric Hoffer