rumblefish360 said Yep! With a 4.25 stroke and .010 over, it’s a 502. And 383 -> 496 (4.250" stroke/6.535" rod) or 383 -> 426 at the stock bore, 438 (4.31 bore, 3.75" stroke/6.760" rod) So those short deck blocks are worth a little something after all. LOL! Click to expand...