darryl The pushrods fully extended and going through the full lift movement. the rods may hit the manifold bend and not let the lifters spin. The cam could also be soft. Do you have a picture of the damaged parts? are they Blue? The iron is probally the cam or lifters worn out. Go to the FE forum I know that there was a problem with a couple of cams not being treated correctly. Your cam is not that big but I still would have pulled the dampeners for break in. I would have broken the motor in with a 10-30
oil, just my choice. 15w- 40 is a little heavy for me on breakin. THIS is just MY OPINION. Some people get a little crazy on this forum. Rick Lake Ps everybody like different breakin oils wieghts