340 Crankshaft bit the dust

All it means when it said it's internally balanced is, it's neutral balanced, for an engine that's balanced in that way. That does not mean it's balanced for your particular engine. There's no way in the world I would buy a crank and not have it balanced, because there's no way in the world the crank company can know all of the weights of all the parts in any given engine. Plus, what if your engine has been balanced before? What then? You could "just throw it in" and end up shaking your teeth out. Why chance it? I consider it part of the replacement process. It's incomplete without it. If you need to cut that corner, then you should be building Revel models, instead of real cars. Just save up if you need to, but do it right.