ORIGINAL: Ronnies

I flew my first gas engine giant with a good running Echo m25 cc motor with its original gas tank and filler cap, now I want to convert to a regular r/c tank with a inlet filler hose and a vent hose like you would set up a glow version. When I checked the original tank to see if the screw on black cap had a vent .it did not the cap was tight and the tank started to swell out , now when I hook up a go to set up my new tank , do I have to plug the over flow vent so now its like its original non vented tank? Please email me or answer the forums so I can install my new tank ASAP I want to test fly my new plane, Thanks [email protected]