Wiring you need the Engine harness for the DOHC motor along with the ECU and gauge cluster. chassis harness is the same. and you need to solder in some wires going to the gauge cluster check the sticky at the top of this forum for a list of everthiing you need to swap over. Taylor Durdan is who posted it. I just did this swap about 8 monthd ago. Its very straight forward and quite simple.