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Head casting #'s?

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Old Mar 14, 2006 | 01:49 PM
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PeewterSS4.8
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Default Head casting #'s?
Whats the difference beteween 862(5.3) and 706(5.3) head casting #'s?
862 are from silverado/sierra
706 i got it from a 2003 5.3 escalade what should be the difference?
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Old Mar 14, 2006 | 07:45 PM
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probably port and chamber changes....but even if not that, somewhere there are enough changes to warant a PN# change apparantly
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Old Mar 15, 2006 | 08:07 AM
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funny you ask that, i'd never seen 706's myself till yesterday..
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Old Mar 15, 2006 | 09:16 AM
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As far as I'm aware, the difference in numbers was due to different foundrys. All the geometry between the two casting numbers are virtually identical.

Richard
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Old Mar 16, 2006 | 04:13 AM
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PeewterSS4.8
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Originally Posted by rgvsierra
funny you ask that, i'd never seen 706's myself till yesterday..
Where did you see those daniel? Normally those 5.3's with those heads come with 03 and up SUVs. someone correct me if im wrong.
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Old Mar 16, 2006 | 08:10 AM
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i had only seen the 862 castings on trucks, but i did see a truck 03 that had the 706 casting. got me curious.
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