cracks in 3B head

[Brandon Rogers]

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Greetings all-
I know it is common for there to be small cracks between the seats on 10V h=
eads.  Is it also common for cracking to occur on the 3B, say between the p=
lug hole and valve seats?  I hadn't heard of this-so thought I'd get a list=
 consensus.  Thanks-

Brandon

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