Air gap water passages?

[Backally]

70 Plymouth 340. Installing a RPM Air Gap intake. I noticed that the manifold does not have water passages, the heads do. Is that correct?

 

[Mrmopartech]

No water passes throw the back of the intake,stock or aftermarket,mrmopartech

 

[TrailBeast]

Your'e good, keep going.
Is that a busted off bolt next to the passage?

 

[Backally]

I swear, posting a question on FABO you get an answer faster than Googling it. Thx guys. Not a busted bolt, just hadn't cleaned the threads yet and they were kinda goobed up with white thread sealer.

 

[RedFish]

I think the heads are referred to as Siamese since they will work on either left or right bank. To do this they have to have the water ports on both ends.
So the ports that land at rear aren't used unless you add a water tube across and over the intake.
Is there any advantage to adding that tube ? I don't know.

 

[green1]

You want to figure out water passages in a small or big block- let us know when you figure it out, lol. Dealing with them since 1968. I don't know.