Hi Coater, When you get it out (you will probably have to cut it out) look closely and you will see that the hole in the frame is worn on one side, so build the weld up on that side, if you get it wrong the swinging arm will be out of alinement.
There is some good posts here about fitting new bushers, would pay to look them up first before fitting new bushers as once you put the bushers in you can't get them out!
Cheers
Peter