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6.9--7.3 heads

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Old Mar 18, 2005 | 08:47 AM
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Question 6.9--7.3 heads

other than head bolt size,is there any different in these heads can 6.9 heads be installed on a 7.3 block if the bolt holes are enlarged ?
 
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Old Mar 18, 2005 | 09:42 AM
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Spectramac
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Nope, we tried that about 6 months ago.

With enough work, you might get them on there, but they would probably leak water all over the place. The 6.9s have extra water passages in the lower corners and on the intake side. The 7.3s have these all plugged. Then there's the different length head bolts near the exhaust. The 6.9 head gaskets had a fix for the lower corner leaks, but the 7.3 gaskets that I've seen don't have it.
 

Last edited by Spectramac; Mar 18, 2005 at 09:49 AM.
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