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-69 cylinder head casting numbers

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Old May 26, 2013 | 09:40 AM
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Default -69 cylinder head casting numbers

Hello i remove valve cover and...

found casting numbers.. what these numbers mean....

3917291

B208

GM 24
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Old May 26, 2013 | 10:24 AM
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Hi 69T-F,
I believe the casting # 3917291 was used for 300 and 350 hp engines during the 68 model year.
I believe the B208 casting date indicates a head cast on February (B), 20th (20), of 1968 (8).
I believe The GM24 is a mold designation.
Regards,
Alan

Last edited by Alan 71; May 26, 2013 at 10:29 AM.
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Old May 26, 2013 | 10:25 AM
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Wrong casting number and date for a '69.
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Old May 26, 2013 | 12:01 PM
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1969 convertible..Car was sold to me as 350HP but i discovered that it is matching numbers 300HP car (HZ in engine block)

But it has 350HP valve covers 350HP sticker + 350HP center console decal. Sticker tuning?

what is difference 300HP and 350HP engine? Cylinder heads?
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Old May 26, 2013 | 05:47 PM
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Originally Posted by Mike Ward
Wrong casting number and date for a '69.
ditto,
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Old May 28, 2013 | 05:27 PM
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ok ok ... i belive... but what these numbers mean...
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Old May 29, 2013 | 10:05 AM
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Originally Posted by 1969Turbo-Fire
1969 convertible..Car was sold to me as 350HP but i discovered that it is matching numbers 300HP car (HZ in engine block)

But it has 350HP valve covers 350HP sticker + 350HP center console decal. Sticker tuning?

what is difference 300HP and 350HP engine? Cylinder heads?
L-46 was HP block with 4 bolt mains, special performance cam, big valve heads, Higher compression, forged crank , forged rods, special pistons, deep groove pulleys , air cleaner is diff, pretty much everything is different . Nearly every major component part number is different. L46 is a very cool engine option for the day .
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Old May 29, 2013 | 03:53 PM
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Originally Posted by 1969Turbo-Fire
...1969 convertible..Car was sold to me as 350HP but i discovered that it is matching numbers 300HP car (HZ in engine block)..
Not with the 291 heads you asked about.

...But it has 350HP valve covers 350HP sticker + 350HP center console decal. Sticker tuning?...
You can stick a sticker on anything.

What are the numbers stamped on the pad?

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