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Old Aug 14, 2011 | 08:10 PM
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Default Mystery Engine Numbers

Looked at a 78 parts car today and the engine block had the number 90803C where the three letter suffix should be. Anybody ever see a number like this one ? Has a smaller water pump than my 77 sbc. Could this be a pontiac engine ?

Last edited by Burnt71; Aug 24, 2011 at 06:39 PM.
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Old Aug 14, 2011 | 08:11 PM
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does the date code on the block line up with the build date. could have been rebuilt in the past and the machine shop could have stamped it so they could track it
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Old Aug 14, 2011 | 09:18 PM
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Originally Posted by Nowhere Man
does the date code on the block line up with the build date. could have been rebuilt in the past and the machine shop could have stamped it so they could track it
Didn't look at the build date just wanted the three letter prefix to tell me if it were a L48 / L82 etc.
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Old Aug 14, 2011 | 09:30 PM
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I think you mean 'suffix' and can pretty well forget using the pad to figure out what the engine is. Most likely a rebuilders stamp.
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Old Aug 14, 2011 | 10:28 PM
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No such thing as a 3 letter prefix.

(oops, Mike beat me)
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Old Aug 15, 2011 | 06:16 AM
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Suffix
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Old Aug 15, 2011 | 07:30 PM
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possibly a Firebird engine ?
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Old Aug 21, 2011 | 08:02 PM
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casting # 3970010 must be a 350
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Old Aug 21, 2011 | 08:44 PM
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Probably but the 0010 block was also built as a 327 in 1968.
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Old Aug 24, 2011 | 06:38 PM
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Originally Posted by Mike Ward
Probably but the 0010 block was also built as a 327 in 1968.
I'll take some pics
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Old Oct 2, 2011 | 07:54 PM
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Bought the car last week. Pulled the engine and found a Jasper sticker under the grease
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