ummm.....after it broke the lifter and ruined the cam...did you NOT check the bearings? I would have cause if it chewed up the cam there is a pretty good chance those metal grinding went through the bearings....I know you have a filter but if my motor comes out./..the pan comes off...especially if something has failed. JMO sorry about your luck...I have been there. I had a lifter break after 20 passes in a bbc and lost all of it including the block. They too were comp and they didn't hit the block it just broke.