Fuel line - SS 396 1967 Chevelle. The line comes ourt of the top of the tank and is routed along the passenger side frame rail on the outside of the rail. There is an opening between the rail and the inner fender well where the line passes through and is routed to the fuel pump at the lower front of the engine block (passanger side). From the fuel pump the line goes up the front of the engine, to the right of the water pump (behind the belt), to the carburator(s).
The right side brake line is routed from the proportioning valve (front disk brakes option) accross the front of the firewall and up to the frame rail near the controll arms where it attaches to the brake hose. The hose goes from the metal line connection to the caliper. The left side front line goes to the caliper from the proportioning valve to the left frame rail near the control arms and again is attached to the caliper with a hose.
The proportioning valve is below the master cylinder attached to the frame rail slightly back from the master cylinder (below the firewall). Note that two lines go from the master cylinder to the proportioning valve. The lines are on the left side (driver side) of the master cylinder. At about 1963 auto manufacturers started using duel safety master cylinders. 1/2 of the master cylinder supplied pressure to the rear brakes and the other 1/2 supplied pressure to the front brakes. A proportioning vale is used with disk brakes so that more pressure goes to the front disk brakes than the rear drum brakes.
The rear brake line goes back along the frame rail and bends inward toward the center of the rear end and is attached to the floor pan above the rear end toward the driver side. It is attached to a brake hose with a "T" connection where a line goes to each rear brake drum in the top of the brake drum backing plate (behind the drums). The lines are fastened to the rear axel in a couple of places. If I remember right the line is not centered but is to the left of the pumkin (Rear end gears) so that the left line is shorter than the right. The line going to the right side is routed over the top of the pumpkin.
My neighbor has the real thing and we just did the brake and fuel lines last June. We converted it from its original front brake drums to front brake disks. We used the correct parts for the 1967 optional front disk brakes set up. We took many pictures in order to be sure everthing was put back where it had been from the factory. Unfortunately the pictures are not digital. Hope this helps.