so then whats the other number that you got from GM?
roush 3500?
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GM parts direct doesn't list numbers, just cut off dates. I was made aware of a different casting number when I called a local salvager to price a pair and was asked which casting number and immediately received the answer to my question regarding why the pair of heads I sold had a different combustion chamber.Originally posted by El_Diablo View Postso then whats the other number that you got from GM?
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