simplest thing i did when putting a ute diff into my coupe was to get the rubbers in the bottom of the shock pressed out & new ones with the correct diameter hole pressed in,i assume this is basically what the problem is.pedders penrith did this for me for the price of the new bushes,i suppose you'd call them.no welding for me,i'm dangerous with a gas axe in hand & don't even think about handing me a grinder,a disaster of monumental proportions in the making,but i can bolt things in pretty handily.