I would go with new tanks....a fuel leak from a tank is incredibly dangerous....
Good luck
GT
uhhhhhhh YUP! I second that mothion! First hand experience........

Don't mess with them, and the last guy I had take a look at one told me two things. IF he could weld it without blowing it up, it would probably leak somewhere else shortly. He made me two custom tanks. Going over this afternoon to pull the tank from my neighbors 17'7" aluminum Bass Boat for a similar problem. Taking the tank to Alllen to make another dupe.......

Trying to convince him to dump the 75 Merc and lemme put a Berk in it........not having much success......lol!
Ray