I *think* on B series motors the knock sensor means it's 1999 or older, also you'll want a VTEC ecu. You should be able to leave the car alone besides the engine harness, if you can seperate that from the wires and get us a pic of that we should be able to tell if its a vtec harness or you're going to have to wire it in. You're running OBD1 and I'd probably keep it that way and get a P28 or a P72 ecu with a basemap for your specific motor.
Someone else can hopefully confirm if the B series will bolt into the ZC mounts