Has anyone ever heard of a special motor with with following attributes: 350ci / 320hp, 4bolt main, and a CNJ prefix to the block stamping?

Thanks,
Nor-Cal Rob

CNJ is an L-48. 350/300 horse with a manual trans, usually a Muncie. I had one in my 70 Malibu and it was a fun car to drive.

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Philip #42
1964 El Camino
1964 Malibu SS FOR SALE
1978 El Camino