Delta you can get the harness from a wrecker just dont pay any more for it than $40 delivered because you can get one from nissan for that price and the same with the boost sender unit, you will have a plug for it in your engine bay near the brake booster. I have got mine nealy done but i cant find a signal for the boost or the oil temp, the others were ok to find, just need to find the right colour wires for the boost and oil temp and will be sweet. ps there is a guy wrecking a r34 gtt on these forums. I think he has sold the gauges but you might be able to get the harness and boost sender from him.