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Any constant vacuum source.
On top of the engine to the right rear of the valve cover is a round plastic unit sort of hat shaped of black plastic with three vacuum hoses coming from it. This is your EGR vacuum modulator. Two hose come out toward the front of the car and one toward the rear and down. Follow this hose and it should go to your EGR valve.
valve cover with a vaccum hose going to the throttle body
it goes to the purge valve in the back of your motor.
There will be a vacuum hose that comes from the brake booster and hooks to the biggest port on the back of the carburetor. There is a vacuum hose that will come from the vacuum advance on the distributor and hook to the left small vacuum port on the front bottom of the carburetor. If you look at the front center of the carburetor at the bottom of it you will see a big vacuum port. The PCV valve hose will hook there and go in the top of a valve cover, should be driverside front. If it is a auto-matic transmission then there will be a long vacuum hose that is hooked to the modulator valve on the passenger side of the transmission and will go to a vacuum tee that you will see on the back of the intake manifold right behind the carburetor. Now I know there are other things on the engine that have to do with emissions but I long as you do not have to have it inspected you can disregaurd the rest of the stuff. The things that I told you about up above is all that you need to hook up to make this engine run good. All the other open vacuum ports can just be pluged off. I hope I've helped you. NEUTZ.
The Vacuum line for an automatic transmission runs from the modulator valve on the rear of the transmission to a vacuum port on the intake of the engine. Any available port will do as long as it is on the intake, not the carburetor if so equipped.
In between the valve cover and intake manifold. Towards the front of the motor. You see your upper radiator hose goes right to it. You'll have to remove the hoses that go from your valve cover to the throttle body to access it.
The PCV valve is located on the back valve cover by the firewall, you will need to remove the strut brace to get at it. The hose runs from the valve to the rear of the intake plenum and it is very stiff, follow it down to the valve cover and pull straight up. It is very difficult to remove due to the lack of room and the fact that the hose is not flexible. if the hose is stiff replace it that's is from the motor runing at 220 degrees all the hoses go bad quick when they run that hot
My 99 Dakota 5.2 magnum has it on top of the passenger side valve cover. The PCV hose will go from the valve to the manifold. The drivers side looks the same, but that's the breather, and its hose will go to the airhat, that's how you tell the difference.
if you have an OHV the valve cover is on the top with about eight 8 mm bolts. The pcv valve is located on passenger rear side of valve cover with a hose leading into the intake manifold and big black plastic nut. if you have OHC or DOHC I can't help.
Get a vacuum diagram from MOTORLIT.COM
Is it one of those big or small hose