I’ve looked “everywhere” and cannot find a 7/16-24 thread chaser tap to clean out the block holes. I assume I’m correct about the 7/16-24 size. Thanks. Bob Fabie Fredericksburg, VA -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://autox.team.net/pipermail/6pack/attachments/20210614/0a773913/attachment.htm>