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From what I am reading this base is not intended for oil filtration, at least not normal oil filters. It is for fuel and hydraulics. I would have two suggestions, the first would be to just get an different base, one set up for 3/4-16, which is the common PH8 size. Or find or make a different thread insert to change the size to 3/4-16.
Something like this:
https://www.lindseyracing.com/LR/Parts/944OFTA.html
Not the correct base size I would assume, but it would be what you need in the correct 1-14 base size.