So i have another dilema. I am working on a 1982 280zx(L28et). I have not had this car running since I started repairs. I replaced the distributor and distributor shaft but made a rookie mistake and didn't take a picture or mark where the rotor head was at. I have now rotated the engine crank where the #1 cylinder is at TDC but how do I know for sure that I'm not 180 out?