My mate had a lifting block fail while reinstalling the engine -pump assy, now has a broken housing that joins the two together. NSW Australia is where he is at , if you have one send me a message or phone me on 0412000665 thanks .
I have had success with welding a cast iron drill press frame with nickle welding rods. Just make sure he gouges into the crack to give it a good surface to stick to.
There are mounts on the pump and the engine, so there isn't THAT much force on the housing, it should be ok.