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98/806 heads on 6.0 for FI?

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Old 12-25-2007, 05:38 PM
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Default 98/806 heads on 6.0 for FI?
Can these be used on 6.0?
If so am I stuck with the 98 graphite head gaskets or could I use a mls gasket?
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Old 12-25-2007, 05:45 PM
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Default Yes And No
Yes you can use the perimeter bolt style heads on a 6 liter. and yes you can use Metal multi layer gaskets.(recomended)
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Old 12-25-2007, 05:55 PM
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So I can use these on the 4.0 bore with mls gaskets

Is the small bore head going to hurt me in the power department?
FYI these are the heads used in my sig nicely ported
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Old 12-25-2007, 07:11 PM
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Default yes
yes you can use them, its better that the heads are worked, the fact that its a 4" bore wont hurt it
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Old 12-25-2007, 07:12 PM
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Default gaskets
just get gaskets for a 05 and up gto or vette
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Old 12-25-2007, 08:48 PM
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Originally Posted by NASTY98TA
Yes you can use the perimeter bolt style heads on a 6 liter. and yes you can use Metal multi layer gaskets.(recomended)
i read that the 98 head has some coolant port thatll need to be blocked off in order to use the oem GM MLS headgasket correct ?
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Old 12-25-2007, 09:04 PM
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Yeah thats the same **** I keep reading to



Maybe mods could move this to internal GEN III
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Old 12-25-2007, 10:38 PM
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Default 98 Heads
When I had 98 heads i used them and had no problems
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Old 12-25-2007, 10:52 PM
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Default Heads
But I have read the same
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