I put one on this year. The factory sent it with the wrong cam so it took a while to get it dialed in, in fact I was still dialing it in when winter interfered. I changed from Z to Y to ZZ cams and 30 to 15 back to 30lb springs. Got the run around from factory. New ZZ can is not fully broke in yet and was slow to down shift. Will get more time this spring. How hard was it to change bushings ?