Fuel system parts relate to parts connected to the fuel pump and surrounding lines. 1600 & 2000 carburetor parts are within the fuel system, but have their own sections located on the navigation bar. Datsun Roadster and Fairlady 310 Fuel Pumps. Main differences in the Kyosan fuel pumps is direction of flow and inlet or outlet line diameter. We carry all variants, as you will see, so you don't have to worry about receiving the wrong unit. Fuel insulator blocks with gaskets attached are available if you want to use this instead of re-using your old block. See part #1685. Be sure to always put your insulator block back on with the fuel pump otherwise the pump may become damaged.