Found a leak/weap just below the mid line of the tank . The tank is painted and it’s coming through the paint so I’m not sure how bad the hole / crack is yet . Any suggestions on how to fix or where I can find a new tank? Would any other tank work out of a newer delta or cutless maybe ?

 

You might be able to fix the fuel tank with a restoration kit.

https://www.eastwood.com/por-15-fuel...epair-kit.html

You also might be able to find a specialty shop near you that restores fuel tanks and radiators.