picked up a 72 with a new crate 350 in it this weekend. Not running because the former owner got tired of working on it before he fin ished the install. I'm not getting any fuel up to the carb. I just put on the pump. Positioned the pushrod on the pump lever corectly and hooked up the lines. Cranked it over for several minutes with no fuel coming up the line. Any suggestions? I'm kind of stumped.