Tank you very much: advice please

So, the restorer wants to replace the gas tank right off the bat, sight unseen, because it is original to 1960 and, he says, "probably has bad interior rust." Well, when I was a recent college grad, my '67 Dart could not hold more than five gallons at a time before it dribbled through the seam. I did end up replacing it myself with a pair of vice grips in a back alley in February. Miserable job. But the question, this tank doesn't leak. Should I just replace it without further investigation? Seems a bit extreme.