You're not hearing what I am telling you.....I told you NOT to use the pluig as a test. Here is the reason: If you look at the spark across just the normal tiny plug gap in open air, and it looks weak there, then you WON'T have a working spark in the engine. A 3000-4000 volt spark (which is weak) will jump that plug gap outside of the engine, but it will take 20,000-25,000 volts to jump that same gap when IN the engine. DON'T use the plug out of the engine as a test method.
Form your description it sounds like you have a simple ignition system problem, which was indicated by the damage you already found. Concentrate there. The spark system should be able to jump a 3/8" gap to metal, so set up the end of a spark wire that far from metal and watch fro sparks jumping that large gap it as you crank the engine. Of course, if you had the distributor out, then you will have to reset it properly like has been discussed.