65 Dart gas tank leak

I know I've been asking a bunch of questions that I should know but I'm running into stuff I've never had issues with before. The area on my gas tank where the pickup outlet is located on the rear of the tank is leaking around the large stamped area. Should I try to JB weld it or is there another fix aside from dropping the tank and tig welding it up. And to boot my supposably 130 gph fuel pump literally is sucking ***! The stock mechanical pump worked better. I understand that they are a pushing pump and not sucking but even after sucking it through with my shop vac it was shitty at best. Maybe I just got a bad one. My luck lately is shitty with this car.