EEC tank vs non EEC/ 71 Dart
"All those fittings" are not just EEC, they are the TANK VENT. All older cars had the vent welded into the top of the filler tube in the trunk, went up, "U" turn down along the filler tube and "open ended" inside the rear frame
The reason for "all that stuff" into the can is to make sure that "something" is above "water" at all times. The liquid / vapor separator can has different heights of tubes inside in order to do that, and one is at the bottom for drainback.
The problem with using just one tank fitting for a vent is, when it's submerged, it will puke fuel out up and over and will start a siphon that will continue to drain fuel overboard until either the fitting "sees air" or the tank builds enough vacuum to stop the siphon.
With the old style vent "up high" the worst that could happen is that fuel would siphon a little bit until the filler tube level dropped down. This "should" be a rarity.
If I were in your shoes and did not want to hook all that back up, I'd do exactly as the old style filler--I'd braze a fitting into the filler tube and duplicate the old style vent.
You can certainly use one fitting for regulator return
old style vent:
None of Mopar caps are vented. The "pressure vacuum" caps on the later cars are not for an operational vent, but for over/ under pressure protection, a relief valve, if you will
Here go read the shop manual:
http://www.forabodiesonly.com/mopar/showthread.php?p=1970088657
72 manual, thank AbodyJoe
[ame="http://www.abodyjoe.com/pictures/Misc.%20car%20info/1972%20Plymouth%20Chassis%20Serv%20Man.pdf"]http://www.abodyjoe.com/pictures/Misc.%20car%20info/1972%20Plymouth%20Chassis%20Serv%20Man.pdf[/ame]
Part of the info is in the fuel chapter, part of it in the emissions chapter in the back
and..................
http://www.forabodiesonly.com/mopar/showthread.php?t=183956
"All those fittings" are not just EEC, they are the TANK VENT. All older cars had the vent welded into the top of the filler tube in the trunk, went up, "U" turn down along the filler tube and "open ended" inside the rear frame
The reason for "all that stuff" into the can is to make sure that "something" is above "water" at all times. The liquid / vapor separator can has different heights of tubes inside in order to do that, and one is at the bottom for drainback.
The problem with using just one tank fitting for a vent is, when it's submerged, it will puke fuel out up and over and will start a siphon that will continue to drain fuel overboard until either the fitting "sees air" or the tank builds enough vacuum to stop the siphon.
With the old style vent "up high" the worst that could happen is that fuel would siphon a little bit until the filler tube level dropped down. This "should" be a rarity.
If I were in your shoes and did not want to hook all that back up, I'd do exactly as the old style filler--I'd braze a fitting into the filler tube and duplicate the old style vent.
You can certainly use one fitting for regulator return
old style vent:
None of Mopar caps are vented. The "pressure vacuum" caps on the later cars are not for an operational vent, but for over/ under pressure protection, a relief valve, if you will
Here go read the shop manual:
http://www.forabodiesonly.com/mopar/showthread.php?p=1970088657
72 manual, thank AbodyJoe
[ame="http://www.abodyjoe.com/pictures/Misc.%20car%20info/1972%20Plymouth%20Chassis%20Serv%20Man.pdf"]http://www.abodyjoe.com/pictures/Misc.%20car%20info/1972%20Plymouth%20Chassis%20Serv%20Man.pdf[/ame]
Part of the info is in the fuel chapter, part of it in the emissions chapter in the back
and..................
http://www.forabodiesonly.com/mopar/showthread.php?t=183956