To the FFM, I initially ran them up the firewall and under the Hydro-booster/fuse box and along the top of the fender well.
I had planned to put the FFM at the Fender Well but there wasn't room to mount it there without punching holes in the hood liner. While I waited on the long process of inspiration on what to do and how, I simply laid it in there and left it for a while.
Later, when I finally sorted it all out in my head. I moved the lines over the steering column and brake lines - away from the motor.
Wiring and lines to/from the FFM. You can see the WIF wires butt spliced. The fuel heater element I replaced came with about 6' of wire so that splice is closer to the harness side.
Current lines running back to the firewall over the steering column and brake lines.
I ran the T-Valve line to the fuse box and mounted it there.
I ran the IP line back along the input line to bring it in under the intake as in the OEM routing. Reason being is the electric Fuel Pressure Sender and wiring. I put a T-splice at the firewall, screwed in the sender and the wiring stays in the back at the firewall.
Here's an earlier shot of the T-Valve in a temp configuration, it has since been moved further back and the rubber hose going upwards is now where the sender is located.
Makes for a long distance run of line, and I may change it up later which is why I don't immediately cut electric wires or fuel lines, sooner or later I'm going to change things.