I have: 00 GSR Engine put in a 98 GSR Chassis. 00 Engine and Cabin Wires. Also have: 00 GSR ECU 98 GSR ECU (P72) 00 GSR Stock Dash Gauges I dont have the 00 GSR Ignition w/ Key that corresponds to the 00 GSR ECU so I definitely have to use the 98 GSR ECU because of the immobilizer in the 00 GSR ECU. I believe I have to get a obd2b to obd2a wire conversion harness to use the 98 GSR ECU but is there anything else I need to change, convert or splice to get the everything working? Thanks guys.