Installed my new cam shaft today. I had to pulled the motor out. The guys of competition cams told me it needed a little bit of grinding for the roller lifter, so I did just a little bit and everything is fine. This is the first time I install my Cam straight up at 106 degrees, no advance. the roller has 268 duration at 0.50 and 276 exhaust, custome grind. My old cam was a Mopar solid 590 for the last six years. No complains with the Mopar.