Re: 1939 Six, hole in back of block is for???

Posted by Packard Newbie On 2019/10/22 20:04:00

John, that it is unthreaded is quite strange. I just had mine out and rebuilt too and did not notice anything like that. I'm sure someone will chime in here with the correct answer. In the meantime, that is sure a pretty block, all rebuilt and ready to go back in!! Something about a clean, freshly machined motor... Chris