Idler arm is easy. mark the frame with the location of the old one. Remove the nut and break the lower end loose. Then unbolt the upper end and remove it. Install the new one and line it up to the marks you made. The ball joints are not that difficult if you have a die grinder or similar to grind the heads off the rivets. Then you knock out the stems and bolt the new one in place. Upper one is easier than the lower one because you don't have as many parts to work around. When you get it back together take it in for alignment. If you used good parts you shouldn't be that far off.