Hmmm my uncle has had his C-5 for years now and it runs 12.1 with minor bolt-ons and never had a problem. If you ever see a older black buy runnin low 12s in a red Vette its him. I dont see where a Vette engine would have any more problems than a Camaro or Trans-am. On the other hand Ive been seeing modular motors letting go left and right lately. I can think of five within recent months.