Cylinder Head

After weeks of waiting I finally got the tools and ambition to unload this massive hunk of cast iron from the bed of my truck. This is one of six cylinder heads off of an Alco 539 6-cylinder prime mover (the engine of a locomotive). At 450 lbs it is approximately the size and weight of the not-too-small V8 engine in my truck! In terms of physical bulk it is also similar.
This head, as well as the one that needs repaired on TLEW 5109, both have erosion on the large tongue visable on the underside of the head. Time, corrosion and pressure have taken their toll, and both need this tongue either rebuilt or patched in order to avoid further compression leaks.
This head is probaly a sample part; the one currently on cylinder 5 of 5109's prime mover may be in better condition. In either event I am going to use this head to get one or two quotes on repairing the tongue.