Also a little easier to trouble-shoot.
As far as no two dead holes on 3 and 4, I assume you mean no spark? I would not make any judgement until you do some testing. It could be a bad stator, or either of the CD Modules could be bad, or possibly a bad/damaged ignition trigger.
A bad CD module may fire the plugs that it is attached to, but interfere with the good module making it appear to be bad. There is an component in the CD Modules that isolate them from each other that fails that causes this condition.
Do a compression test first!