72 Grand Prix Gas Tank

I am working on getting my Dad's 72 Grand Prix back on the road after sitting since at least 1985.

The big problem is that the gas tank is rotted out, cleaning it isn't going to help it. I've looked everywhere and can find a gas tank for a 70 GP but am not finding for the 72. My question is, are these the same tanks? If not, or even if so, where would you suggest buying one?

Any help is appreciated. He's said if I get it on the road he'll have the interior redone and all body work and paint. That's all the incentive I need!

I would try the many advertisers in Hemmings News.

No luck. If anyone knows if the gas tank for the 70 model is the same, I can buy that one new. Unfortunately, 71 and 72 aren't listed on any website.