Can i replace the ignition coil?

the center wire from the distributor does go to the coil, the coil gets its "juice" from thr electrical wires running to it. one is positive and one is negative, the coil should have marks denoting such. Before you buy a coil, check your ground wire and make sure its not broken,and is tightly connected at both ends, just follow the wire from the coil to the terminal end. On your positive wire on the coil, the same procedure should be followed, but, additionally,use a 12volt continuity tester on the coils positive terminal. A continuity tester is a small screwdriver looking device with a pointed tip, and the top has a wire running out of it with an alligator clip, inside the handle is a bulb. Attach the clip to a ground source, usually a bolt etc, and then stick the pointed end if the tester into the positive wire, the bulb should light if you have a good ground. If this checks out, then you want to check for spark at the center wire of your distributor cap, do this by having someone start the engine, if it will start and then you pull out the center distributor wire, a strong spark to the center post in the distributor cap will indicate a strong coil. This procedure will either identify your coil as the culprit or rule it out as your problem.