skunk2 makes obd2-obd1 conversion harness, if you'd like to go with a major name brand, there are a few other guys who make them. One side of the harness plugs into your new obd 1 ecu, then the other side is a bunch of wires (vtec, o2 sensor, etc.) that get spliced into the ob2 engine harness. You gotta get one for a 2000 prelude. I think they run around $200.