Radiator shops around here won't touch an old gas tank. If there are new tanks available (an option I didn't have) that would probably be the best route to go. If you want to save your original tank a search will turn up hours of reading on how others, including me, have done it. Good luck.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.