I've got a 94 LT1, rolled over 126k today at lunch. Only problems I have had is the water pump. Only other part that has failed is the clutch after 80k. I drive the ish out of this car EVERYDAY. I'm still on my stock opti which *knock on wood* may be going downhill. (Car breaks up at WOT upper RPMS, occassionally.) But I get up everyday and crank 'er up and she gets me to and from work without missing a beat!
She's got a few bolt on's as well.
Hope that helps.