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Which heads?

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Old Jun 7, 2011 | 07:17 PM
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z28MP's Avatar
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Default Which heads?

I recently finished up an LQ9 which is going in my 01Camaro SS. I have the 317 heads which it came with but I also have the heads off of an LS1 too. I made the switch because I blew my old motor awhile back and now I am finally almost done with the swap. Now I know typically for boost purposes you want to switch to the 317's. But, since this will be my DD which heads will be more beneficial for me to run? I know I won't be getting great gas milage because its a heavy 6.0 with a cam but I am just trying to decide which set of heads will be the most efficient?
Only bad thing about the 317's is the engine looked like it was sitting for a LONG time. There was all kinds of rat **** between the intake and heads. So the heads will definitely have to be cleaned before they are even considered to be put on anything.
Thanks
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Old Jun 7, 2011 | 10:56 PM
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what are the ls1 head castings? you can have the 317s milled for $100.the 317 are like 799s with larger chambers.
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Old Jun 7, 2011 | 11:04 PM
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I can't remember I'm not with my car right now. I know for a fact they are the heads off of a 97-98 ls1 because of the bolt pattern. It's crazy I bought this car with an ls6 block and the old heads. Don't know what happened to the original heads.
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Old Jun 8, 2011 | 12:33 AM
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I'd go with the 317s milled about .035 to get compression up and have them thoroughly inspected (valve guides, seats, etc.) and dipped in the acid bath at the machine shop.
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Old Jun 8, 2011 | 01:20 PM
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Cool thanks for the advice guys.
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