My engines both seem to have excessive valve train noise. I run edelbrock heads and the rockers shown below. When I rev the engines, they clatter. I have switched the heads before and run the stamped rockers and the engines sounded nice. They sound like crap with the rockers shown and the edelbrock stud shown.
Anyone know what rockers these are? There are no part numbers stamped on them. How might I get this valve train to quiet down. Buy new rocker arms? I measure the ID of the rocker bore (mounts to stud) and get .440". I measure the stud and get .430". Is that an allowable clearance? Seems excessive. Also, the rocker bore rides on the threads of the stud which seems like a bad design. What would you recommend?
I can't stand the rattle and need advise.