the fitting I wanted to allow trans pressure test arrived, screws into the T55 port
I found out they are also a direct replacement for the trans disconnect fitting, which would allow one to dispense with the double ended quick disconnect meta & rubber OEM contraption, that is NLA, for a simple rubber line on flares all the way
not really neccesary, but good to know of a alternative
As you can see it is M14 x 1.5