Did not do a pressure test. I know the JB will probably leak, and like I said I'm hoping this gets me through the rest of the season and I can address it with pressure test and welding correctly over the off season

 

You positive it's a seam and not traveling from another location ?

 

You could visibly see it flowing like a river from the seam on the top about 2-3" away from the end of the tank. The JB has fixed it for now, so I'm guessing I hit the right area. Everything is dry since

 

How has it held up and what exact J-B Weld product did you use? (I have similar problem on 40 yo tank)

 

remove tank, remove fuel, let it air out, drop some dry ice in it, sand to bare metal, have it soldered by a radiator shop and pressure tested to 10 PSI MAX in a water tank to verify it is fixed.

hit it with some zinc primer and paint

 

I fixed a 78 Monza oil pan in a pep boys parking lot with J.B. cold weld and a penny back in 1988 the day before I was supposed to drive 800 miles for my wedding. Never had an issue and sold it in 93. That thing could **** and git with the 262 V8 but the back spark plugs were a bear to change.

 

I ended up not chancing it and taking the tank off and bringing it to a buddy of mine who is a professional tight welder. Took a few tries before it was done (hest created new holes) but it ended up being leak free. I threw some job weld over it just for peace of mind, then sanded and painted it. So far so good.