Moving a gas tank

[carecom]

I just bought a 69 GMC that has the gas tank behind the bench seat. The smell of gas is pretty strong, especially considering that the upper tab on the end of the neck has broken off and the gas lid won't tighten down anymore. I would like to move the tank or at least figure out a way to get rid of the smell (and get a new neck so the lid will tighten down). Is it possible to move a tank and if so, how hard is it to do so? Is it possible to do it myself? This is my first DIY truck, so be gentle, my feet are still wet and I'm still trying to figure out how to do this stuff! <grin>