This Master M fuel pump is a perfect fit for your Nissan 68-73 510 or 70-72 521. It is a mechanical drive type pump with a pressure of 3.5 psi and a flow rate of 23 gph. This vintage pump is made in the United States and comes with gaskets, making it a complete package. It is a great replacement part for your vehicle and is compatible with various part numbers including 1069, 3700524, L21-1273, 602-1226, SP1301MP, 2542747, A14133136TG, B0019P, M23075, af1069, M70058, and 151-1064. The pump is designed for gasoline fuel type and has a voltage of 12 V. This item is a vintage part and is not intended for universal fitment or performance parts.