I can provide more engine specifics if needed but I have a solid roller 557 bbc,stud girdle,prox .700 lift camed motor. This weekend at about 5000 r's I thought I blew my motor....k-bang k-pop ect. Long story short....when I pulled the valve cover ...a rocker arm jumped off the push rod on #3 exaust. I put it back together and made it out of a hurricane out of powell yesterday but I havent dared punch it again. Does this sound familiar to anyone?? Maybe a weak spring??