Petronix Electronic Ignition Any Good?

I just had a thought, could a very long coil to dist wire be to long [ my is 24" long], coil mounted on the inner fender well? 318 engine, Have weak spark as shown with a spark plug test light. Car seems like wants to start, have a few hits but will not run. Tried to see if by turning dist. to adjust timing would help but no change as to how the car tries to start , I have the coil wired as per the instructions, that is - and positive wire hook up. Power from ignition switch to + on coil, and red wire from Pertronix dist, and black wire from dist to - on coil.