360 Con rod bearing quick question

As in post 2, it's to put oil on the cylinder walls. A moment with a file will do it. But IIRC, SCAT aftermarket rods do not have the slot so engines survive with oil being slung up on/deposited the walls from other sources. Production /6 rods had similar oiling holes for a long time and then they disappeared in the 70's or thereabouts.