D7 3T Core Plugs

Hi forum, currently fitting new liners and piston & rings to a 3T engine serial number 3T11667. I cannot find any listing in the parts book for the head core plugs. The engine was sitting for 10 years and was stuck (rust damage to number 1 & 4 cylinders) and had 3 litres of water in the sump. Engine still looks good on the bottom end but the heads need usual work like lap in valves, new precombustion chamber gaskets. Should I be checking or replacing the core plugs. The water manifold and...

D7 3T Core Plugs

D7 3T Core Plugs