I have not used an autometer guage on my 280zxt, just a pressure guage. What I did was put a T fitting in front of the factory sending unit that is mounted on the left side of the engine compartment. Using 1/8 " rubber hose i ran the line into the drivers side. this allows for the use of the factory unit also. I used safety wire to make a clamp on each connection so that the pressure will not blow the hose off. Ihope this info. helps.