I resumed work on the fuel lines tonight and got started by fabricating the fuel return line. I used a special 90º swivel fitting with 1/2 NPT threads instead of installing a 1/2 NPT to -6 AN adaptor and then a 90º AN fitting on the hose becase this doesn’t stick up as far. Even this sticks above the top of the fuel tank by nearly 1/2″, and the trunk floor is only 3/4″ above the top of the trunk. I made the hose about 1/2″ longer than necessary to put a small bend in it. This will prevent the hose from being pulled tight if the tank moves around a bit.
The return line connects just below the supply line with the filter.
The fuel lines run just outside the right main 4″ chassis tube. I briefly considered bringing them up in front of the passenger foot box, but that would put them very close to the right exhaust header. Instead, I marked and began cutting a hole in the passenger foot box floor to bring the fuel lines up farther back and farther away from the exhaust headers. The cut lines follow the inner wall of the passenger foot box. I’ll fabricate some flanges to rivet the wall to the floor along these edges.
I cut the fuel lines just aft of this hole and flared them for some fittings. I’ll fabricate some shorter tubing sections later to run from here up behind the engine in the engine bay. There will be hose segments connecting the rigid tubing to the engine to allow for engine movement.