centering rear end

I recently replaced all the bushings in my leaf springs and that helped with my rear end being off center,was 3/4",now is 1/2".which I have heard is not unheard of.But I recently bought new steelies,15x8 w/4 1/2 BS.The tires clear but the drivers side is awful tight.I have been thinking of moving the perches over 1/4" to give the drivers side a little xtra room to the outer wheel lip.Plenty of room to the springs.Will moving the perches hurt anything? Should I take the rear end apart or just weld them on with it together?