I'v decided to go with the Mechanical fuel pump but wich one? How much GPH do i need? Which psi should i run? Edelbrock said don't go over 6psi, Holly said 6.5-7psi. I currently run a mostly stock 460 w/600cfm Holly double pumper(750cfm somewere down the lake)I'm so lost on this topic so if any body can help PLEASE DO SO............p.s. I'd like to stay away from running a return fuel line......... Thanks