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i got an engine in a trade was told/ it was a 496/440.well the pistons are std stroke srps.it came with a forged crank.on box it said 4.125 stroke.std rods,20 under mains.the rod journals are chevy 2.2 they match the rods grp 6.800 5100 series.on the crank it says std rod/20 mains,well machine shop told me they measured 3.665 stroke on the crank didnt make sense to him he mesured handful of times still 3.665.he was confused as was i.then he told me with the 55 overbore it comes out to 440.im very confused what should i do?i cant find any info about this online.is he measuring wrong?hes been building bad ass race engines for 30 years.its lawrence machine hanford ca.

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Where did a 3.66" stroke crank come from? A stocker is 3.75"
Doug

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It was probally offset destroked from the standard 2.375 rod size down to the 2.200 rod journal size, IF it IS Actually 3.66 stroke I' trying to rememer the exact storke that the old Pro Stock 366 C.I. Hemi motors used