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1999 procharged vette head question

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Old Jun 4, 2011 | 12:13 AM
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Default 1999 procharged vette head question

I have purchased a 1999 vette with the d1sc procharger setup. It seems stock expcept full exhaust and a tune. i ordered a set of 317 heads but didnt even check what was on the car. Guess i should have looked first lol. Anyways my question is this: where the casting number is on the front outer edge of the head is milled off? i would like to know what heads are on the car before i swap them out but all there is is a number stamped on the exhuast side of the head on the same surface just below where the 243 or 317 casting would be. The number stamped in the head is as follows: i think and 8 or 0 then 350b2532856.
I have tried looking here and LS1 tech to find any sort of number like this with no luck. Same with google. Anybody seen this? I will get a picture and post it up soon but if anyone as any info or where another identifying number is that would be great. Thanks Justin
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Old Jun 4, 2011 | 12:19 AM
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Old Jun 4, 2011 | 01:40 AM
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Yeah that is pretty common, i dont know they gm mills off the casing number but that is most likely a 241 head. I have yet to see a 243 with the numbers milled off. Also being a 99 and assuming that it is stock then it came with 241 heads.
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Old Jun 4, 2011 | 08:37 AM
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Originally Posted by austin@RPM
Yeah that is pretty common, i dont know they gm mills off the casing number but that is most likely a 241 head. I have yet to see a 243 with the numbers milled off. Also being a 99 and assuming that it is stock then it came with 241 heads.
I believe that 97-98 came with 806 heads, 99-00 came with 853 heads,01-02 came with 241 heads. My 2000 has 853 heads.
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Old Jun 4, 2011 | 09:11 PM
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Thanks for all the replies guys will be lookin into it further. Guess I will be taking a valve cover off and looking in there for a casting number before I go through all the work of changing the heads. Thanks again.
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