1963 Valiant V200 Wagon

the filter is in the right direction and all my fuel lines, tank, and sending unit are new. unless i have a defective sending unit maybe. i need to pull the plugs and see whats going on. i am also having a problem with it idling while in gear now, it seems like a vacuum leak, but when i hook up a vacuum gauge it reads 19. should i take this reading in nuetral or with the car in gear?