I have an 86 f150 i300 longbed pickup. since i bought the truck i cant get gas to flow into the tank at a decent pace. i can only go about half speed and takes forever to put gas in the truck. I understand it maybe a vent problem? Im not sure but id like to just replace the entire neck strait into the tank. Ive tried taking the old filler neck out but it wont come out. is there some kind of crimp on the inner hose? can someone explain how to make a filler neck swap? thanks