When you make the front end or replace the trailing arm, buy the bracket with it. You need a bigger and stronger tension arm, that's the bolt on the "HD" part. Moog No. K6534HD. As a couple, this is an amazing combination. Buy both and use GM's genuine pitman arm. Also use Amsoil Dominator Racing Lubricant. These parts love it. Take my word for it and buy these parts. Moog's pitman arm doesn't fit properly so I recommend using a GM arm but a Moog HD spanner and this bracket. Post any questions!