Most of the after market starters don't have the extended studs to attach the bracket to and some customers would just toss them and trouble was on its way as all the weight of the starter is on the back end. pounding over dock plates or rough yards did not help without the weight supported. I have made my own brackets as the threaded holes are there in the block and order new mounting bolts each time as they are knurled for some bite. If your bell housing gets cracked holes you can drill through from underneath grind a little flat spot on top of bell housing and come right through with a longer bolt, washer and lock nut not easy but do able. Good luck