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Old 04-18-2021, 05:28 AM   #47
'68OrangeSunshine
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Join Date: Feb 2002
Location: Tucson, AZ USA
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Re: 1971 GMC Fenderside 4x4 Build

Those are the casting numbers. It was run on Conveyor line 2. The clock like thing points to what shift it was cast on. [Guessing 2nd shift 5 PM -- 1700 hrs]
3394258 is the block casting number.
The numbers I'm curious about are hand stamped into the machined pad right after the distributor hole. Sometimes painted over. Sometimes milled off by rebuilders. Sometimes restanped with rebuilders' own numbers. Occasionally intact.
From that shot, pan your camera forward to the distributor area.
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Every 25 years I like to rebuild that 292, whether it needs it or not.
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