Don't stretch the yoke. Use the Power custom washers. The washers are hardened steel and actually give a smoother mating surface for the cylinder and yoke to run on. You will still need the yoke facing tool. Hands like those in the Brazilian are almost impossible to find. You can use a modern hand but you will have to remove the hammer block in the sideplate. I have seen those hands TIG welded up and then remade to slightly larger dimensions.

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S&WCA 1729