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Generation III Internal Engine 1997-2006 LS1 | LS6
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Can you mix match head with different casting numbers?

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Old 08-21-2004 | 06:54 PM
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Default Can you mix match head with different casting numbers?
I have a set of 5.3L heads and 1 says 702 or 706 cant remember and the other says 862, these heads are getting a port job and will match in that aspect but the casting numbers will be different, any problems with that?
thanks
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Old 08-22-2004 | 12:47 AM
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??????
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Old 08-22-2004 | 03:30 AM
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I don't know about the 5.3's but the 5.7 castings have different flow rates, so i wouldn't do it.
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Old 08-22-2004 | 11:31 AM
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my buddy has the same thing and they bench flowed the same
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Old 08-22-2004 | 11:52 PM
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any one eles?
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Old 08-22-2004 | 11:58 PM
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I if they truly are the same I don't see any problems but I personally wouldn't do it......how did you manage to have different year/casting types?
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