b20vtecturbe

on my 96 honda civic dx hatch is my firewall harness vtec ready, basically if i have the d16y8 and engine harness can i just plug the harness in at the firewall plug and play up the p2p sohc vtec ecu and be done or is it more to it then that??? i guess im trying to find out if my firewall harness is equiped with vtec wires and whatever else it need to run the vtec motor and the vtec ecu????