[BRENT in 10-uh-C]

Well, I do not want to dispute the advice that Les has given but the tank was originally welded (--not soldered) at the factory, ...and to open them up, we cut thru the factory weld. We use a jig fixture to re-weld the tank back together and I feel certain you could not expect good results by soldering. If you feel like you can, then by all means give it a try and report back how it does after driving the car some.