Fuel tank venting question- 1966/1967 & 1972 Charger

I have a 1972 Charger (B-body) with a fuel leak. First off, the charcoal canister was removed and blocked off (near the engine) long ago. Fuel cap is stock Stant #11806 which is a pressure relief cap. The leak seems to coming from just above the the 4 vent tubes on the passenger side of the tank. First I thought it was the hoses (original). I pulled hoses (they looked pretty good) and chopped off 2" of hose and reconnected, same leak. Then I installed new fuel hose with blocked ends, still same leak. Not sure if vent tube welds are leaking or from above tank but it seams like where vent tubes are welded to tank, yet they don't feel loose. Only way to tell is to drop tank. I want to repair tank and install vented cap for a 1966/1967 Charger, Stant #11646 because I don't need pressure building up in tank without the emission control charcoal system. I can tell the pressure builds up because often when I gas up I can her a big whoosh and even sometimes hear the tank kinda pop.

My questions-

1) Is 1966/1967 Charger fuel tank only vented thru gas cap or does it have an additional tank vent?

2) Is what I plan to do a good idea?

A little help? Someone must own a 1966 or 1967 Chager or FSM that can help answer where the vent is?

66/7 charger vents from the front of the tank, and runs up intothe 1/4. the 72 vents to a box over te axle, and yes sounds like the soldered joints went away in the 72 tank the gas cap change will work, necks are the same but the tanks are entirely different

So I think when I repair tank I am going to weld up the 4 vents and just vent thru the 1966/1967 vented cap. My 1962 has a vent from the tank with a non vented cap. Don't understand 1966/1967 would have the tank AND the cap vented but I assume as long as the cap vents I won't need another vent from the tank to atmosphere. It clearly says "vented" on cap.

Quote:

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66/7 charger vents from the front of the tank, and runs up intothe 1/4. the 72 vents to a box over te axle, and yes sounds like the soldered joints went away in the 72 tank the gas cap change will work, necks are the same but the tanks are entirely different

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My '66 Charger vents from a fitting at the left side rear of the tank. Goes through a couple elbows and a steel tube to the filler tube. Actual venting is done through the gas cap.