Information on all GM GenIII Heads?

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Nov 26, 2007 | 08:15 PM

#11

TG02Z71

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From: Wisconsin

Forgot to ask, how can you tell one head from another by markings?
Do they have numbers cast in or stamped somewhere?
What signifies a 317 head?
Thanks.

Nov 26, 2007 | 08:22 PM

#12

nightrunner

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From: Manchester, TN

casting number cast into the head, its in one corner, i think its the passenger side front

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