if you have a obd1 ls and the vtec head you are throwing in there is a obd1.. you need to just add wires to hook up the vtec.. http://www.allmotorhonda.com/techpag...ies-wiring.htm tells you the wire colors and pins for the ecu.. you will also need a p28 or obd1 p72 ecu depending on the head... or you can just run some type of engine management (ie: crome, hondata)