I repeate, if the negativ terminal of the coil is connected to ground, the engine will never fire! On transistorized marelli ignition, folowing wires should be on the coils treminals:
poisitive terminal:white wire from fuse box with switched +12v, red small wire from transistor control box belowe coil
negativ terminal: black/greeen wire to tachometer, black small wire from transistor control box belowe coil, and another short black wire from cilindrical shaped supressor mounted to the heatsink on the side of the coil. Any other wires should be removed.