Fuel Tank Leaking...any easy fix?

i agree with stroker scamp above...gas tanks typically rust inside out...and a leak will most likely seep very slowly through the shell of the tank than a drip drip you can actually see..i've tried gas tank sealers on my old chevy truck, but it was only a tempo fix and i eventually put a plastic one in...hopefully this design tank went in more than just these wagons...i also hope your sending unit/sump isnt siezed on...that being said, i wouldnt use a "used" tank...my dart only had 24000 miles on it and there was still crap making it through the fuel filters and into the carb...call the summit tech line, have them pull out a Dorman and goodmark book, and see if they can special order u a tank for your car. $200 is worth a new tank to me vs any kind of sealer/repair you wanna do

http://www.summitracing.com/search/Part-Type/Fuel-Tanks/Make/PLYMOUTH/Year/1973/?Ns=Rank|Asc

(i realize these tanks are probably not interchangeable with yours, but just b/c its not on thier website doesnt mean they cant get it!) good luck