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Mystery block


ntxcustoms

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Ok scratching my head here. I have a mystery block i came across. Numbers ground off the pad so no luck there it's a 23" block mopar l-head. But...the stroke is a little under 3 7/8" all reference material i see doesn't list that measurement. It's like it's destroked which would mean no torque...which would suck. Bore is 40 over from 3 1/4". It's fully rebuilt so i would love to run it but what the hell is it? Thoughts?

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