Thread: 1970 XF block
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Old 08-08-2025, 05:35 PM
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Join Date: Nov 2004
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Default 1970 XF block

You know what it is. 455 4-bolt main. I'm considering building it to about 400-450 hp tops. I plan to stud the mains and align bore. Question is, Do I need to stud the end of the main caps or just buy the 10 stud kit ?

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