A does not go to the fuel pump. It goes to a charcoal canister in the engine compartment. The big loop (5) goes up into the passenger side pillar between the door and the rear glass. D connects to the fuel tank.
Here is how the loop attaches to the tank and where it goes in the pillar. Then it runs into another hardline along the tank edge then through the floor. This is in my 1972 GMC C15.
http://67-72chevytrucks.com/vboard/s...&postcount=313
Gary