This isn't a question for AZ. Look for a video on YouTube. However, of the tank is damaged, replace it. Go to the junkyard. Especially if you are concerned about safety at all.
If you are talking about the fuel pump. You have to remove the tank, unless you have a truck, then you can remove the bed. I never heard of repairing a tank if its damage you have to replace it.
Thanks! Your answer is awaiting moderation.