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  • Here looking for info, I came across a sbc in this73 nova, number on the back of the block reads 3910010 K 11 ,, on front passenger side of the block in front of the head reads 241533832. KC 5. 15 I'd any can make this easy for me ,I would appreciate it
    The 3910010 is the casting number for a 4" bore block. On the front machined pad in front of the rh cyl head's end, two possible stamps. The larger one, back from the edge, defines how and where the block was machined AND what it was to be. A smaller, deeper stamp, at the front edge of the pad, should be the last section of the VIN the engine was ultimately installed into.
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