Manifold Primer

[Jack Innes]

Hello, Has anyone had any experience with the primer system often seen on early race cars that is composed of a hand pump and one or more fittings threaded into the intake maniflod? My main question regards the manifold fittings - are they just normal fittings or some kind of nozzles?

The attached picture shows an engine that is almost impossible to start by hand. Once running the BB1 carb is gravity fed & works very well with the added length on the manifold. A primer would help, I think.