Well here it is. I'm going to discribe my fuel set up and as time and life progresses I'll share more, if y'all have any comments or questions bring em on. So back in March I got this thing, '87, 6.9, ZF5, 4:10(supposed to be, it was really cruising different than my dually on the test run) and it's got a Century 502 tow body with a wheel lift.
I've gone over the whole fueling system, except the IP. The tanks have been cleaned out, created new lines in the tank (see thread "my answer to shower heads") and I redid the lines from the tanks to the engine, which is what I am going to break down on this post.
The left tank is for "clean diesel" the right tank is plastic and for WMO. Return lines go to the WMO tank so I can have clean diesel on demand. The diesel tank is plumbed into the cab(yep, into the cab) with 5/16 line, the WMO is plumbed into the right tool box with 3/8 line to a fuel filter and then into the cab(sure nuff, the cab) the two lines meet at a manual 3way valve mounted to the front of my homemade center console from which they unite and travel in 3/8 line next to my shifter through a glass fuel filter that works as a sight glass and then on through the firewall to where the water separator used to be.
The theory is that, during the winter specifically, that before I shut it off I can switch to diesel for a moment and back to oil before I completely turn it off, so there's a little more diesel than oil in the IP and fuel filter for a easy start on less than 45F days. It probably sounds complex to the uninitiated but it really isn't.