Stop in for a cup of coffee

Hey I have a question for you, well for anyone. Trying to figure out what this roller is. It’s a very solid roller, floorboards have already been replaced. It looks like someone started a build on it then for whatever reason, it ends up here in the junkyard.

I’m thinking it’s a late 40s or early 50s GM but which I’m not sure

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Looks like an old Buick or Pontiac. Try 1956