gas tank barracuda

ok guys need suggestions
i have a 68 barracuda that i just put a 8 3/4 with a back brace on it.looks great BUT after i installed it and lowered the car off the jack i see that the gas tank hits the brace. its about 8 inches wide and maybe 3 inches deep.the tank actually sits on the brace..i perfer not to go with a fuel cell yet as this is a new tank.and it did have gas in.i have ss springs on it so it is raised a fair amount.
can i round out the tank with a body hammer for clearance ?
can a used tank be cut and rewelded?
help
thanks
terry