Hey Stu,
Give it to Alby at "SERCO" 90 Deshon St Woolloongabba. He'll look after it, they chamfer the ports and supply Vertex and racers choice pistons. If you want OEM quality pistons try Pro-x.
Just remember to hand finish the ports using a small rat-tail file and 600-800 wet and dry.
cheers
Big Bill.