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Old 10-12-2012, 07:20 AM
AutoGear AutoGear is offline
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I found this Number Detail - Casting Numbers .info: Numbers for blocks, heads, GM RPO codes, and more
which states Aluminum 15* head made by GM. 224cc and 61cc at the chamber. It must be something rare if WDCreech hasn't seen it.

Last edited by AutoGear; 10-12-2012 at 07:25 AM.
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