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Old 07-13-2007, 08:28 AM   #1
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Question Do you have to notch block for a 331?

Hey all,
Do you have to notch the block for a 331 stroker? And for the 347 where do you need to notch the block at? Which cyclinders, all of them or just specific ones?
Thanks,
Steve
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Old 07-13-2007, 08:44 AM   #2
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My 331 is notched in all the cylinder holes at about the center of them.

Its not much just about the size of my thumb maybe.
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Old 07-13-2007, 07:46 PM   #3
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I didn't have to notch mine for clearance, but I did it anyway to be on the safe side.
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Old 07-13-2007, 08:06 PM   #4
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Mine is not notched.
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Old 07-14-2007, 12:40 AM   #5
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No notching here either. It will depend on which rods you have in it. Mine were close on the bottom of the cylinder walls but had "sufficient" clearance. A bigger H beam might have needed grinding.
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Old 07-14-2007, 12:47 AM   #6
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just do a mock up, .065 thou clearance is minimum between rod bolt and cylinder
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Old 07-14-2007, 03:19 AM   #7
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Not all blocks need to be clearanced, so you have to mock your block up to know for sure.
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Old 07-14-2007, 03:26 AM   #8
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put it together with no piston rings ...but with LOTS of THICK assembly LUBE on the bearing inserts....
and see what you GOT.....
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Old 07-14-2007, 12:35 PM   #9
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This picture might help. Its a 347, but you'll get the idea if you end up needing to grind a little.

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