You need a vent, as high as possible, small and with a dust filter if possible. It can be remote vented with hose or tubing but some way needs to get air into it to replace the liquid that is leaving the tank.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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