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Dbug....As JSeery said, there is ABSOLUTELY no difference between Ford & Merc blocks...'49-'53....PERIOD!
If you'll look through the PDF file listed below, it is a site that fellow 'Barners "V8Bob" and "Moe's Garage" compiled years ago actually showing every bellhousing/starter plate combination that exists for 8BA-type engines. For info on each picture, place your cursor on the QUESTION MARKS at each picture. It don't get NO better than this valuable info! Click the link below! DD
https://web.archive.org/web/20160318...ellhousing.pdf