35 H8 inlet manifold

This is a 35 H8 inlet manifold, I'm wondering what was the original purpose of the tapped hole that is now occupied by copper/brass plumbing fittings? 

Also I notice there is no drain in the manifold to get rid of excess fuel should it accumulate in the manifold. What do others do? Leave it as is? Tap a fitting and drain tube in the base of the manifold?

Thanks in advance.

Comments

  • Thanks Ken.

    Does anyone have thoughts on the manifold drain part of the question?

    Looking at the bell housing, its only held solidly by the 2 top bolts, the rest of it is pretty much flapping in the breeze, the back plate offers little support. Were bell housing fractures common for this era?