You have to watch out with the harnesses there had been a few issue with overfuelling due to the addition of an extra harness. Honnestly i dont know why you would want to go through the hassle of making a new harness..? when changing a few plugs around on the standard plugs would give you the same outcome.. not matter what with or without the harness your are still doing to need an additonal temp switch i guess its just less hassle and less of a change of something going wrong just re-wiring the standard harness