Chevy SBC 350 High Volume Aluminum Short Water Pump with Heater Port [Black] The larger needle bearing fulcrum

The larger needle bearing fulcrum can withstand valve spring loads up to 600lbs

it has a square bore carb flange instead of a spread bore

They start to make awesome power around 3

Speedmaster manufactures these master cylinders from quality materials to ensure proper fitment

Chevy SBC 350 High Volume Aluminum Short Water Pump with Heater Port [Black] The larger needle bearing fulcrumSpeedmaster high volume water pumps have a ribbed aluminum housing and a heavy duty ball roller bearing assembly. Speedmaster water pumps have a bigger impeller and larger cavity size to flow 40 percent more coolant than stock. Choose long or short styles in a natural or shiny polished finishes. Get high flow for your car with Speedmaster water pumps.