ALL new head bolts, yes they stretch.
Quality gasket set
Depending on Km'/mileage then a proper head overall by engineering shop ideal
good tools
worshop manual
doing hydraulic lifters then change rocker shaft, rockers and pushrods
New hydraulic lifters require a special way of starting up and mantaining high rpm for x mins
if you can remove engine as its alot less hassles out the car than in, been there done that
Quality gasket set
Depending on Km'/mileage then a proper head overall by engineering shop ideal
good tools
worshop manual
doing hydraulic lifters then change rocker shaft, rockers and pushrods
New hydraulic lifters require a special way of starting up and mantaining high rpm for x mins
if you can remove engine as its alot less hassles out the car than in, been there done that