Now THAT'S something you don't hear every day... :)
Don't worry - most folks will convice you that the 318 will take minimum work to install, provide better power and practically equal mileage. Just remember that there is a small but faithful (and knowledgable) contingent of slanters who can help you try and meet your goals with the little, unappreciated six. It just takes more time and effort. Best of luck either way!