Adding Fuel Return line to 1970 Mopar

There's a few ways to skin this cat. If I had one of these cars, I'd convert it to the 69/ earlier open vent looks like this:



If you are just building an anti - boil return, IE with Wix filter and built in return

http://www.partsgeek.com/assets/rep/full/1114558.jpg

You actually COULD use the factory vent.

Another way is to leave the factory system alone, leave the front tube open (which will BE the vent) and make sure it's high enough it won't siphon over

then do like I did for a return..........empty the tank, and fill it with CO2 from a MIG tank. Punch a hole in the front face of the tank away from the sender, and silver braze a fitting / tube into the tank