To Resize Connecting Rods or Not?

Oh yeah. I've had a few engines over the years marked with the Maltese Cross. That means non standard size "somewhere".
In case someone don't know where to look for those stamps, they are at the top of the block below the head on the driver side front. Remember, they are for a stock block and may have been changed after a rebuild. As everyone says here, CHECK, tolerances before closing up a rebuild.