I ran my lines from the rear crossmember up the passenger side and then where the frame goes up around the spring Tower I move to the top of the frame and then up the passenger side fender well where I mounted the bypass fuel regulator. I did my fuel system with all AN fittings, except the fuel pump because the wild horses kit doesn't support threaded fittings. In the future I'd like to replace the pump and filter with one that has threaded fittings so all of my high pressure system can be AN.
I created a plate that goes on my rear crossmember to support the external fuel pump and then use stainless braid to connect the tank to the pump, the pump to the filter and the filter to the hard lines.
I've been very pleased with the end result.
-JB