[countrypuppy4865]

Yes, as WJ said the optisparks are well known to give trouble. A common problem is a water pump going out, which allows water to leak on the optispark. With an ignition problem I would say either the module on the coil or optispark. They are quite pricey if you get a GM optispark from a dealer. I would try Jegs or Ebay they both carry some good quality optisparks.