Nissan 300zx LS1 Wiring Harness | SIKKY This harness is specifically engineered for a Nissan Z32 USDM 300zx (1990-1995) or JDM Fairlady (1990-1995) with the GM LS1 Cable Throttle engine swap. It was developed in house on an actual LS1 engine in an Z32 chassis to ensure a perfect fit to all engine connections. 300zx LS1 / Vortec Swap Wiring Harness | Wiring Specialties Brand new Nissan 300zx LS1 / Vortec swap wiring harness. This tucked, plug and play wiring harnesss is made in the USA from the ground-up and is designed to exceed OEM specifications for wire quality and routing. Includes detailed instructions and a start up guarantee.