How do I stop vapor lock?

Chrysler NEVER did and you MUST not vent into the trunk. Further, having, not having the early vent will have nothing to do with how the tank fills


PLEASE PLEASE do yourself a huge favor. Go over to MyMopar

http://www.mymopar.com/index.php?pid=31

and download SEVERAL factory shop manuals. 69 for certain, because it shows the early vent. 70--through 73, and read the fuel sections about "tanks" and the emissions sections about the evap / fuel system.



I posted this earlier and evidently you didn't see it or didn't read it. This is a good rendition of the non CA / early 70 and earlier vent. It comes out near the top of the filler, hooks to a tube, and bends UP near the top of the rear quarter, then down alongside the filler and OUT THROUGH the floor gasket and the tube ends "open" in the rear frame rail. IT IS NOT open to the trunk



I had very same issues.
I listened to 67Dart and put the sleeve heat shield on my fuel line from where it enters the engine compartment to the pump, from the pump to the regulator, and from the regulator to the carb.
Installed 1" phenolic carb spacer.
Changed out my dead head regulator for a return style and ran the return to the old tank evap line.
Installed a vent just as in the diagram through the grommet down into the frame rail area.
Have not had another problem since.
Using a Holley Mechanical pump and a Holley regulator set to 5.5 psi with my Eddy carb.
Listen to him. :prayer:
Knows his $H!T :cheers: