Fuel tank vent.

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In my opinion the best way to solve vent problems is to duplicate the 69/ earlier vent. Look it up. Go to MyMopar and download a 69 service manual. Weld or braze a fitting into the removed filler tube so that it's far enough down that it won't interfere with a nozzle, and stick it in so it's flush outside, or nearly so. This is because you have to insert that tube from the outside.

Then just buy a length of (brake) tubing, and run it up high in the trunk, up near the rear quarter, and back down the filler tube and through the floor grommet, and end the tube down below the car.

Trying to use a vented cap my very well end up (on a hot day, with a full tank) with fuel running down the fender

It may also be that your's is not really plugged. There is a sort of check valve near the engine end of the tube. If you retain it, you want that tube up HIGH in the engine bay. Cut off the check valve, then see if you can get air through it
 
Ironracer said:
I've read Alot of Good things about the 3 way Wix Filters here..
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I am using a similar filter on a LS1 in my truck. They came in corvettes. It's actually a regulator and filter in one. Whatever the engine won't use or what's over the psi of the regulator it diverts it back to the tank. I wonder if it's a similar deal.
 
H8z2luze said:
I am using a similar filter on a LS1 in my truck. They came in corvettes. It's actually a regulator and filter in one. Whatever the engine won't use or what's over the psi of the regulator it diverts it back to the tank. I wonder if it's a similar deal.
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I'm not sure. I've never used one like that. The one Dana67Dart was referring to is a filter, with an extra outlet, if it's what I'm thinking
 
Not all tanks had them. It was a year thing.

Probably 76 is most likely to have multiple nipples.
 
H8z2luze said:
am using a similar filter on a LS1 in my truck. They came in corvettes. It's actually a regulator and filter in one. Whatever the engine won't use or what's over the psi of the regulator it diverts it back to the tank. I wonder if it's a similar deal
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My understanding is there is a very small orifice that bleeds the vapor and a tiny amount of fuel but you still get more than enough fuel to run the engine.
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Dana67Dart said:
Not all tanks had them. It was a year thing.

Probably 76 is most likely to have multiple nipples.
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All I remember is my car would idle, but die at the most inconvenient time! But a 5/16 and a 1/4 were rolling into the bay. Demoed it all, and attacked with new, then all was well...
 
Dana67Dart said:
My understanding is there is a very small orifice that bleeds the vapor and a tiny amount of fuel but you still get more than enough fuel to run the engine.
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We did something similar to this when I raced outlaw karts with cr500 engines. We would put a carb jet in the return line otherwise it would starve the carb for fuel and just send it all back to the tank. Interesting how stuff crosses over.
 
On my 1972 it was the same setup. The hard line was laying there open by the right front fender well. I put a small nipple under the bottom of the air cleaner and ran a rubber hose to it. That way it vents into the air cleaner, no fumes, no problems. Plus it looks kind of factory. Been that way for 15 years at least.
 
I bought a 71 duster that had all of the vent work fuel tank and filler tube missing. I plugged all the tank vents and used a vented cap. It was the simplest way to go.
 
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