Getting ready to install a mech fuel pressure gauge and had a question for those that have installed one on there 6.7.

Where did you put your banjo bolt? The only place that i can see for it to go is on the inlet going into the back of the filter housing....

Also if any of you did a mechanical fuel pressure gauge, you got any pics of where you mounted the isolater?

And something thats had me thinking is if you do have to use the back of the filter housing for the gauge reading how is the fuel pressure gonna read pre-filtered? Is there gonna be much difference opposed to reading after its filtered?

THANKS