I just did a full return fuel system this winter and have plenty of pump to run E85 now. I'm running twin 465's with -8 feed/return lines and Div X fuel rails. My concern is will my 80# injectors do the trick or will it be scary close. I should only be around 750rw. In reading I've heard he said she said they are good for a solid 800rw. Thanks for your input guys.