For street use, and a lot of the bracket cars a QUALITY mechanical fuel pump does just fine.... Edelbrock, Carter, and a number of companies have mechanical pumps flowing upwards of 110 gph and pressures up to 9 pounds.... Then there's the new style one for the chebbies, only 1 moving part!!! The majority of the good mechanical pumps have
3/8" NPT threads, which works fine for -6 or -8 hose or tubing....

When it's time to go drag racing in something running 12's and faster, I usually go to one of the good electric pumps with -8 lines and a regulator with a return line..... I just don't like them rattly old electric pumps on the street!!! The new gerotor style is considerably quieter, but they're also a whole lot more $$$$$ then one of the good mechanical pumps....