The only thing you could be talking about is a pilot bearing that has come apart.
It must be the bearing race remaining in the crankshaft.
You may need a small grinder like a dremel to cut it out.
The flange that the flywheel bolts to, the ring that center the flywheel are all part of the snout.
They are all the flywheel flange.
If you are talking about not using it on the new crankshaft you couldn't possibly be talking about a Ford 351c engine.
Post pictures. That will help explain.
We're only trying to help you.
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