Engine 304 Intake vacuum port identification

[Tim_Coble]

Here's the intake from my AMC 304 , can someone help identify these potential vacuum leaks? The tubing was already rotted away when I got the Jeep and I can only guess at a few of them. I assume either 1 or 5 went to the carb(?) and I can probably use one of them for my power brake upgrade. 2 probably went to the distributor. I have no idea about 3 and 4.

That loose hose off the EGR sensor takes a vacuum from the carb, right?

 

[TSB8C]

EGR is correct.
PCV is correct.
Exhaust back pressure sensor is correct.
1 = Full manifold vacuum port, usually used with a factory air pump and spark control switch. Cap it off if not used/needed.
2 = Temp gauge sensor.
3 & 4 = Choke heater (could have a cover plate if not used/needed).
5 = Another full manifold vacuum port (could be used for power brake booster if not using a lower port on the rear of your carb). Cap it off if not used/needed.

 

[Tim_Coble]

Awesome, thank you!

So, distributor gets it vacuum from the carb? Interesting. Wish my manual had a nifty diagram like that.