Aeromotive 15102 and 15101 are the adapters if your going to use the return system and then I used Aeromotive 14111 fuel rails.
I decided not to use the adapters but used the rails and made my own full return setup. I felt the stock lines (send and return) were to small to support all the pump and the size of the rails. I wanted to make some good HP (450 - 550HP) and I just a worry wort and a ol'schooler. Fat pump(s), fat lines, good rails, good regulator = HP for years.