Get a payen multi layer gasket this also comes with a seperate top gasket as well , just done one this weekend , it had water leaking out of each front couner of the head , points the watch

new headbolts 30Nm then 180 degrees and 180 degress ( skim cylinder head)

with the head upsides down the castings in the head are very poor use a die grinder or dremmel to relive the casting to the right size.

get engine to tdc before removel all 4 pistons should be half way down the bore , do NOT turn over when head is off this moves the liner seals at the bottom of the bore.

and get your cam timing right