This is a 16v breather fitting from a KR block. It normally has a steel insert cast/shrunk into the big hole. Since the g60 block has different spacing for the breather assembly I had to make my own which necessitated removing the steel insert to use as a base. I figured this would be a decent enough first test since it wasn't a load-bearing part and there was plenty of surface are to play with.
My aim is to relatively neatly fill the cut in the side made with an angle grinder to remove the steel insert.