Thank you Kornkurt for your rapid reply and the good news that I can use the dipstick in either engine!
Since the oil pan was off the 8 I was able to see the dipstick Full Mark lining up approximately with the top of the oil cleaner rim. Later with the oil pan back on I added 5 quarts of oil and noticed the dipstick was at the full Mark like it should be.
Thanks again for this valuable Flathead
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