I used to have a ranger that blew a plug. The ceramic blew out of the casing. It shredded the plug boot and the damn thing flew up into the insulation mat attatched to the hood. It took some chunks out of it too. It did no damage to the engine.

Plan on buying a new coil, it and the boot are surely shot. They aren't hard to do.

I wouldn't give up on her yet. My Expy has 170000+, and is doing great. It had a few minor hickups shortly after I got it, but is doing great now. I'd pull anything with it anywhere.