92' Jeep 4.0 6 cyl

I have a 92 jeep 4.0 cylinder. I have had some issues with the clutch. I was driving and down shifted a gear. There was a shearing/ popping sound, then the truck died and would not turn over.Some thing blew out a small hole n the bell housing. That was fixed, but now I have no spark on the 1st and 6th cylinder. Drive train is good. Maybe a bad sensor or a problem with the distributer?? HELP. I'm stumped. any theory's would be greatly appreciated.; The engine is n a 88' jeep Comanche. THANX