The 67 is way different then the 66. The 64-66 have NO vent line if the
correct tank is in it. The 60-63 has one vent line.I'm not sure where the
mechanic came up with the multiple vent line thing.
All of the tanks from 60-66 will interchange. The
style without a vent line requires a vented cap, or the tank will collapse.The
style with a vent line requires a non vented cap, Otherwise, you way get a
dangerous buildup of gas vapors.
John
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