That is very impressive Tom! 425 or 401 ? Ever been rebuilt? To what would you most attribute such longivity ? Im trying to keep from rebuilding mine ( 425) for as long as i can. So far, im at about 140k . I change the oil every 3k miles , keep her tuned as best i can, rarely drive over 70 mph. In short, i baby my car. Thanks in advance for any pointers.