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Old 03-03-2014, 03:50 PM   #1
buz48
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400 small block

Hi Guys If I bore out a 400 small block .030 over how many C.I. do I end up with?
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Old 03-03-2014, 03:55 PM   #2
specialtyretail
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Re: 400 small block

Quote:
Originally Posted by buz48 View Post
Hi Guys If I bore out a 400 small block .030 over how many C.I. do I end up with?
Thanks Buz48
406 cubic inches.
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Old 03-04-2014, 12:30 AM   #3
Marv D
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Re: 400 small block

406.77 to be exact,, but not many 400 blocks clean up at +.030 any more, and anything over +.040 is a VERY shakey platform for any kind of abuse. Most shops won't even bore them +.060. There a thin wall casting to begin with. Work cautiously and have the block checked thouroughly before assuming it's servicable.
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Old 03-04-2014, 09:00 AM   #4
burnin oil
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Re: 400 small block

As said above it is a 406. For some reason parts are sometimes labeled as 408. When I rebuilt my 400 it was 30 over and the scat kit was for a 407-408.
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