Look closely at the gold lines in this cast iron piece.  Click on the photo to enlarge it. These are the bronze allow brazed fusion lines that remain after machining the surfaces back to original dimensions. I used special  cast iron brazing alloy from Muggy Weld .com in this repair. Click on photos below to see the various stages of repair. There was no need to replace the broken out original cast iron piece pictured below. Substituting it with a larger steel piece made more structural sense.