I'm rebuilding an old Sig Kougar and using the fuel tank out of another old plane. This fuel tank has a straight vent line going into it. IE. it doesn't curve upwards into the air space at the top. 50% of the time it's submerged. Other than fuel coming out of the vent line if its removed from the muffler and lowered below the vent line in the tank is there a performance problem with this? The previous airplane seemed to run flawlessly with this set up. I don't own a tube bender to change it. Any input would be appreciated. Thanks for looking.