SCS Professional Series Quick Change Gear Set #15 BR40052 the standard part number is

the standard part number is for the regular red and blue

1957-1977 Ford Ranchero

Engine speed sweep test mode

QFT's 2x4 blower carbs feature shortened throttle levers for clearance

SCS Professional Series Quick Change Gear Set #15 BR40052 the standard part number isSCS Professional Series Quick Change Gears are made from aircraft steel for maximum strength. Each gear has a shaved finish to minimize backlash and run out, and is broached for proper 10 spline shaft fit. The SCS Extra 5 step heat treating process yields maximum gear life for high stress applications such as big block Oswego Super Modifieds and World of Outlaws Sprint Cars. Gears have a black oxide finish, and the faces have been lightened to reduce