Intake vacuum fitting size.

[Mopar318]

Can someone tell me the size of the intake manifold vacuum fitting on the front of the manifold. I'm wanting to get my car together tomorrow, and I forgot to pull the fitting, to see what size it was, so I would be great if I could pick everything up at ace in the morning so I can hook up the vacuum block.

I circled the one Im talking about. I know its bigger than a 1/4"npt.

[cordes]

All of them are 3/8ths NPT.

[Mopar318]

Thats what I was thinking but was not sure.

Thanks.