Sender Unit FUEL: 3/8th / 9.5mm line 67 Cam & 67-68 FbdSender Unit for 1967 Camaro & 67 68 Firebird using 3 8th 9. 5mm SINGLE line. This will replace the original exactly and is the main one used for all original 1967 V8 Camaro & 67 68 Firebird series. Some USA States had different emmision requirements so vapor return lines were used in those states but ongoing your car's FTSU may have also been changed or the vapor line removed. Features single 3 8" fuel line & comes with lock ring and rubber seal &