I feel like an idiot for asking this so late in my Y-Block experience, but I have visited several website and I am confused.

I have Y, maybe a 292, maybe a 312...where is the casting number to determine, and what numbers will mean what? Most of what I have seen gives me little idea of what would definitively be a 312 or a 292, a lot lump them (or don't say anything about 312s).

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People should not be afraid of their government, a government should be afraid of the people.

--Alan Moore