I have an early 74 260z 2+2 with factory E12-05 transistor ignition and stock electronic dizzy. Car was starting up and idling fine 2 weeks ago. Last week went to start car and it fired once then nothing (no spark). After testing the coil (pertronix flame thrower 1.5 ohm rating (1.1 ohm primary and 8.99 kohm secondary as tested)), pick up coil in dizzy 6.99 kohm at plug and to transistor box, and ohm'd wires from transistor box and all seems ok. . Then I noticed that I would get a weak spark when the key was turned to start , nothing while cranking ( would get a weak spark once in a while), then would spark when key was released back to on position. Me and my buddy have spent several hours trying different things, Which leads me to believe the transistor box is bad. I have no way of checking the box. This was my fathers car and he had told me he changed the E12-05 at least on two occasions while he owned the car from 1976 to 1982. I have searched this and several other forums and there are so many different ways o go about this it makes my head spin. So after all this I am looking for a reliable ignition system. I am not into keeping the car stock If there is a better item I am all for it. My thoughts are: 1) crane xr-3000 with ps-91 coil (motorsport auto recommendation) This is my choice as of now. 2) msd 6al (expensive) 3) 280zx distributor E12-80 module (30 y.o technology) 4) pertronix ignition unit ( would I need a 240z dizzy) I have not seen a lot of feedback on the xr-3000 Any Help is appreciated Thanks Mike