If it were me I would weld up a forklift tine post anvil and use the cylinders as horns, save the rail road rail for future projects, and use the coupler as a striking anvil if you ever have someone striking for you. The coupler has some great features, it looks like you have a built in dishing depression/ straightening. It works well on end as a post anvil, has a hole that you can drift through. The possibilities are endless.