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1971 Challenger 440 6 pack vacuum line help??? #2353285
08/13/17 04:47 PM
08/13/17 04:47 PM
Joined: Jan 2010
Posts: 250
Cent, OH
Mopar.70 Offline OP
enthusiast
Mopar.70  Offline OP
enthusiast

Joined: Jan 2010
Posts: 250
Cent, OH
I'm needing help with the vacuum line routing for my 6 pack challenger. The car has power brakes, I'm running the DC aftermarket 6 pack set up. I've also got factory valve covers and the 71 vented tank. I'm curious what all hooks up where and what I should use. I have a 71 3 nipple breather and a 70 single I can use. I've not had any luck finding a factory diagram. I bought new fuel line that was pre-bent. I have 3/8 supply and 5/16 return. But don't see using the return with the aftermarket fuel pump and carbs. Should I use this for vent with the 3 nipple breather? Questions I'm looking to answer:

- where to hook vacuum line for distributor
- manifold has large port and couple small ones, larger to booster, smalls ones?
- PCV valve runs to?
- Should I use the 3 nipple breather and run one to tank, one to PCV and one to air cleaner?
- Or should I use the single 70 style breather?
Any help is much appreciated!! Thanks Moparts!!

Re: 1971 Challenger 440 6 pack vacuum line help??? [Re: Mopar.70] #2353318
08/13/17 07:08 PM
08/13/17 07:08 PM
Joined: Jan 2003
Posts: 9,436
Blair County,PA
62maxwgn Offline
master
62maxwgn  Offline
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Joined: Jan 2003
Posts: 9,436
Blair County,PA
This should help with single nipple breather,PCV goes to valve cover.

Picture 226.jpg
Re: 1971 Challenger 440 6 pack vacuum line help??? [Re: Mopar.70] #2354647
08/16/17 03:33 AM
08/16/17 03:33 AM
Joined: Mar 2008
Posts: 9,550
Sacramento CA
M
Morty426 Offline
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Morty426  Offline
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Joined: Mar 2008
Posts: 9,550
Sacramento CA
Originally Posted By Mopar.70


- where to hook vacuum line for distributor
- manifold has large port and couple small ones, larger to booster, smalls ones?
- PCV valve runs to?
- Should I use the 3 nipple breather and run one to tank, one to PCV and one to air cleaner?
- Or should I use the single 70 style breather?
Any help is much appreciated!! Thanks Moparts!!


- the vacuum line goes to the small nipple in the metering block of the center carb
- manifold should have a threaded port in the back, install large nipple there, that is where the brake booster hose goes
- PVC hose routes around the back of the motor and connects to the base of the center carb
- 71s ALL have the three nipple breather the big hose goes to the air cleaner, the center carb should have a bowl vent, connect a hose from the vent to the breather, the last hose goes to a 5/16 fuel line that goes back to the fuel separator in the truck (not the tank)

Re: 1971 Challenger 440 6 pack vacuum line help??? [Re: Morty426] #2355039
08/16/17 07:52 PM
08/16/17 07:52 PM
Joined: Jan 2010
Posts: 250
Cent, OH
Mopar.70 Offline OP
enthusiast
Mopar.70  Offline OP
enthusiast

Joined: Jan 2010
Posts: 250
Cent, OH
Thanks for the replies guys! Since I have the direction connection carbs I wasn't sure if I'd have all the location to run the 3 nipple breather.







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