I have a 78 c10 regular cab w/ a 5.7L. I was having fuel delivery problems so I decided to install a holley red electric pump. I installed the pump just after where the dual tank lines come together and lower than the lines. I mounted, wired, and hooked up the pump and turned it on. No fuel is coming out of the line. I don't think any fuel is getting into the pump at all. Any suggestions? Both my tanks are at about 1/4 tank of gas. Please help!