Well not the sheet metal the EMD 710's are the non-cast block we used to do a lot of the air-boxes (in side the block) then we shiped them to EMD they wield it all into the ruff block then we machine it to size then ship them back to EMD for assembly. The V20 in the photo in the thread I linked to was ready to ship back to EMD.
Here is a photo of 2 raw V16 EMD H-Cases and 2 V16 EMD 710's getting shipped out.