I seriously doubt that Edelbrock is trying to twist anybody's tail. They are an old line family owned company with a reputation to uphold, and have made their name on quality and service to the Hot Rod and car community. If they recomend a part to go with one of their cams, I'd give the benefit of the doubt to them. In recent years, they have put a lot of effort and engineering into the development of parts that are compatible, and designed to work together to the best advantage. Why would they risk their reputation on such a silly marketing tactic?