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BradX 07-24-2012 09:11 PM

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.

68NovaSS 07-24-2012 10:37 PM

What's your question??

BradX 07-24-2012 10:41 PM

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?

68NovaSS 07-24-2012 10:46 PM

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?

F-BIRD'88 07-25-2012 02:51 AM

Won't matter much .. as those heads are crap on any motor. 07-25-2012 06:18 AM


Originally Posted by F-BIRD'88 (Post 1576901)
Won't matter much .. as those heads are crap on any motor.

X-2 terrible castings.

BradX 07-25-2012 07:08 PM

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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