360 main bearings question

I just converted to full groove mains (bought a new set of identical half grooved bearings & used half of em) when I refreshed/modded my circle track 360 & I had to cut a new tang groove in the block (#5 iirc) for the new grooved bearing half as the non grooved bearing half, it's tang was located differently fore/aft. EDIT dont know offhand the block year. MORE EDIT with more thought, the groove i cut was in the cap as that was where the ungrooved bearing half was that I replaced with a grooved one