Quick and Dirty Way to check fuel pressure on a 2nd Gen PSD?

[mankypro]

My fuel pressure gauge is installed on the regulator of my WVO fuel pump - I'm going to be moving it before long to be able to watch both fuels - but right now I just want to check my fuel pressure coming out of the oem fuel bowl into the heads. Is there a quick and easy way to do this?

 

[Double-S-Diesel]

there is a port on the back of the filter housing, its a 10mm oring thread.