360 rocker ticking

beleive it or not, you can idle this motor without a valve cover with minimal clean up. one with the top cut out is better as itll deflect pooled oil, but whatever you use you can usually get an idea which rocker is suspect, then you can pull pushrod and roll it or even pull the offending lifter and do a little 2 minute surgery and clean it out. Every one I have opened had "glitter" under the check valve, whether it was from a good motor or toasted. It just takes a few pieces to hold the check ball up and soften the lifter.