I used Automotive Machine in Fraser years ago for a rebuild on an Inline 6. They did a great job on it. I know they moved to a new location but I believe they are still around.
Bart, from Automotive Machine, is the gentleman who did the machine work on my 318 over the 2021-2022 winter. My engine builder, Doug (from Port Huron), sends all his work to Bart. Sadly, Doug isn't interested in doing a rebuild on the old Plymouth.