Oops - my bad, I assumed (you know starts with a** and ends with me), that a 9/16" box-end combo wrench would be attached (at any clocking) to give the additional "purchase" needed for the loosening/tightening of the filter.
This would work with an extension (needed only if firewall recess) and a torque wrench held at 90* to your wrench.
You could read the torque direct, without any math.