I don't see an issue. Smoke it. After 5 to 10 bowls, you won't see the crack. I don't think reaming it caused the crack so it obviously existed and survived for decades without causing a problem.
Me personally, on a crack like that (based solely on what I can see in the picture) I’d do the same thing.
Unless I was wanting to experiment with working on it just for the experience, I’d smoke it just like it is, letting a thin layer of cake cover it up.