Just purchased this Pertronix Ignition Coil model 40011 which is rated 1.5 ohms and was wondering if it is connected correctly to the ballast resistor and to the eléctrical system. I am also concerned if i am missing any washer or plate which is fastened to the ballast resistor as i want to have a secure and long lasting coil. Do i need to add any additional protection?

You could use a washer under the screw between the coil and resistor to make a better fixing point. The resistor should be wired in between the positive terminal on the coil and the power supply. Can't tell if its connected properly by the photo's.

Does it start and run?