[turtlecrxsi]

There's a big hole in your firewall (maybe even 2) right near your ECU where the harness comes out. You really can't miss it, man. There are 4 bolts holding the ecu cover in place, if you unbolt them you'll see the wire harness connections. Honestly, you probably don't even need a full EX harness, cuz your HF is already wired for MPFI. All you really need are a couple more wires which connect to a couple of connections (one is the vtec solenoid). I think you might can get a OBD0 to OBD1 piggyback for cheap.