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This Speedmaster 300M steel crank gear
With an adjustable vintage plastic snapback closure
Our EFI systems provide excellent throttle response throughout the RPM range along with smooth engine operation
Speedmaster offers their version
Chevy SBC 350 1.5 Ratio 7/16" Ultra Black Chromoly Roller Rocker Arms Set This Speedmaster 300M steel crankSpeedmaster roller rockers are available in various ratios, so you are good to go. They feature greater strength and durability, capable of withstanding valve spring load. .
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