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Old 07-24-2012, 09:11 PM
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Tell me why?

I just picked up an 86 grand prix. It's supposed to be all stock. When I pulled the valve covers off the casting numbers of the heads are 462624 which was 350 only heads. I got the intake number which is a 305/350 intake. I can't imagine someone putting the 624 heads on due to the combustion cc difference. I can't get to the block casting number either. Very weird. Maybe i'll be lucky and someone put in a 350.
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Old 07-24-2012, 10:37 PM
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What's your question??
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Old 07-24-2012, 10:41 PM
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Is there any way to tell if it is a 350 before I pull it? With those heads on a 305 would the compression be high enough to even run?
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Old 07-24-2012, 10:46 PM
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You can't read the casting numbers on the top drivers side of the bell housing extension? Or the stamped codes on the pad in front of the passenger cylinder head?
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Old 07-25-2012, 02:51 AM
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Won't matter much .. as those heads are crap on any motor.
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Old 07-25-2012, 06:18 AM
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Originally Posted by F-BIRD'88 View Post
Won't matter much .. as those heads are crap on any motor.
X-2 terrible castings.
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Old 07-25-2012, 07:08 PM
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Yeah I know those heads are crap. I also found out that it is a 350 so I was pretty stoked about that.
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