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#1
07-24-2023, 10:44 PM
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1969 427 Block Stamp thoughts
Hello all, I found this 1969 427 block available for sale. Casting number 3963512.
Cast date C 12 69. 4 Bolt mains. I can’t make heads or tails out of the pad stamps. Anyone have any thoughts on what this decodes to? I appreciate your input. Thanks Rob
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1969 Camaro SS 396 X66 Lemans Blue 1969 Corvette 427/390 Lemans Blue 
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#2
07-24-2023, 11:06 PM
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Tonawanda May 7th assembly date, 7BA = marine application. Not sure about the other numbers.
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John 
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#3
07-25-2023, 03:20 PM
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Seems to be a lot of these popping up lately. Mine is a August '68 cast 270 block, 7BL suffix. I've found a few very desirable engines in the old cabin cruiser type boats in graveyards over the years. Those usually have corrosion issues. The racing boats usually ran a closed cooling system, from what I've learned from researching the sport.
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#4
07-26-2023, 09:33 PM
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Thanks for everyone's help. I'm searching for a good clean standard bore 427 for my Camaro. Plan is an L88 spec build. So 4 bolt main is a must. Not sure if a marine block is for me. Rob
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1969 Camaro SS 396 X66 Lemans Blue 1969 Corvette 427/390 Lemans Blue
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