I needed an engine for my Barracuda, an accaquaintance had dropped off a 318 short block the year before. It was stuck and one piston was very reluctant to give up the ring stuck in it, dug it out with a screw driver. Couldn't hook a finger nail at the top of the cylinder, or on the crank, so it was "standard", never measured anything!! I didn't want to know, cuz I knew I'd end up spending money I didn't have. Just made sure everything was as clean as possible. Went 13.92 at 98 and change.