5.9L LA block main bearing HELP!!!

The last time I used a set of these bearings in a Mopar was over 30 years ago but I'm pretty sure they had the extra holes and it didnt hurt anything. The engine (a 273) ran fine & took a lot of abuse. It did spin a rod bearing a bit but I later found out that one of the guys in my shop class loosened one of the nuts on the rod after I had torqued them but before I bolted on the pan. I got lucky because I heard the noise & shut down the engine before any real damage was done. As it was, I just had to replace the rod & bearing. A lot of work but I think it only cost me about $30.