Harmonic balancer question?...

I'm looking to buy a harmonic balancer from one of the local guys that has Mopar parts... Just wanted to make sure this was naturally balanced? It looks like it it's got a couple little drill outs but that may be just to naturally balance it? It certainly doesn't look like the 360 one that I have and I'm not quite sure if the 340 sometimes had a different balance for whatever reason? Anyhow this is the one..
I'm looking for a neutrally balanced...