I don't care why they failled they did i got MAD! many time's not worth the stress and down time I'll never use that engine again simple. . .
my uncle ran 350's in his whole fleet of tow truck's many of them lived 250-300K mile's, he had one 454 that hit 340somthing thousand mile's than intake warped took out a few valves that was the end of that one. . .
Mike