My metra 80 that i was clocked at 70 on is still running stong after close to 1000 hard miles. Two soft seizes within the first hundred miles, but no big deal. Eat up a lot of clutches. Sheared a woodruff key, and flywheel. Ate up a bearing, but thats all just cause of the shear amount of power it makes. We are all finally getting to understand these things, and its getting to be that the cylinders are lasting longer than parts of the bottom end.