Depends on the system you choose. My inline pump does require a return line. The stock fuel line is used for this. Other kits..their Command fuel system and the intake pump does not. Visit FITECHEFI.COM for specifics.

Don't be skeered to swap to EFI, I made the jump and it's worth it. Pulling a 6bbl air cleaner on and off to adjust floats and mixture screws is no longer in my list of things to do. Adjust the AFR, pump shot etc on the fly in the car! Giggity!!