i think after all my years of 'testimonials' the gas tank ..more tham likely has rust in it.......this is going to cause you problems=sooner or later.....you need to check this out,great gas,new fuel pump,new lines,carb etc,won't save you on this one...over the log run......trust me on this,it happened to us on a 67 camaro that had been sitting in a garage=inside for 23 years.......just something to ponder,iif its just to start.well maybe you will be ok,personally i would drop it and see for myself,but if you gonna drive it,among all the other parts that will need brought up to spec,taking care of this WILL save u a ton of headaches.....gofast.