Can you mix match head with different casting numbers?

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08-21-2004, 06:54 PM

MikeB.RamAir

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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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08-22-2004, 12:47 AM

MikeB.RamAir

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??????

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08-22-2004, 03:30 AM

dudas35

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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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08-22-2004, 11:31 AM

MikeB.RamAir

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my buddy has the same thing and they bench flowed the same

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08-22-2004, 11:52 PM

MikeB.RamAir

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any one eles?

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08-22-2004, 11:58 PM

2001CamaroGuy

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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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