snowboard3r411

ok so i have been putting my 6.5 in lift on my 1990 2 door and everything has went smooth till the back part of the lift. the leaf spring bolts were sezed to the bolt and they both broke the nut on the inside of the frame rail on one side the other side the bolt broke with part of it still inside the nut on the frame rail. im talking about the side without the shackle. i know there is many people that have gone though this problem and is a theaded some where could some one show me a link or whats the best way to get the nuts out and put new ones in?