Yes it will work for now. However, OPP will be switching to an encrypted system within the next year or two. And even a P2 scanner won't be able to decrypt it.
You do need APCO 25 voice decoding to hear OPP which is what I meant. Whether it's 3600 or 9600 etc you need "APCO-25 Common Air Interface" I wasn't referring to a pure P25 system. Either way we are both right.