I straightened a 20′ roll of 3/8″ stainless tubing and then cut it in half. I made a few bends to allow it to run under the passenger seat just outside of the 3″ round tubing.
I flared the end and added a flare nut and sleeve. The fuel filter will mount here and be supported by a large adel clamp.
I fabricated a fuel line with a -6 ORB 90º connector on one end that hooks to the fuel pump.
It snakes forward and connects to the fuel filter.
I then fabricated the return line so that it parallels the supply line under the seat and up the diagonal support.
It will run just under the fuel filter and will have a fitting where I’ve made the mark. A flex line will connect it to the return fitting on the tank.
