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#1
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Heads
I am doing a mild 455 build up and I am looking at 2 different heads one is a 4X with screw in studs the other is a pair of 46 I am using flat top pistins with the 4 reliefs I know this is not a lot of info but any guidance is appreciated thanks
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#2
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Can you check the secondary application stamp on the 4Xs to determine which casting they are? Also, what year are the 46s?
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