1966 327 .030 over bore passed sonic test hot tanked magnafluxed . Cut to fit rings rods rebuild with big end resize and new bolts . Crank is steel .010 rods .010 mains new cam bearings as are main and rods L79 compression height pistons ( small domes ) correct intake manifold and oil pan . Correct core rebuildable water pump . Correct draft tube baffle under intake . Crank was align honed to square block