I have just about everything wired up but having trouble with the prime cycle. The oil switch is a three wire one. When I hook it up what looks to be right it does not prime. if I bypass the switch...

Just hooking up a 1993 TBI to a chevy 350ci crate motor in a 1955 chevy truck. Looking for wiring diagrams. Need wiring for map sensor and fuel pump (three wire) oil pressure switch.