Holeshot 3000 for Ford 1970 to 1982 step case C4 APPLICATION: Ford 1970 to 1982 step case C4 with 10.5 in.bolt circle, 26 spline input shaft, 1.375 in. crank pilot. A higher than stock stall speed as delivered by the Holeshot converter will provide several advantages and benefits in vehicles with modified engines. Many modifications, particularly big cams, tend to reduce low end power and torque. The high stall converter allows the engine to launch the car at a higher rpm where more torque is available. The Holeshot is generally a very good choice for the typical street machine that is looking for better launch capability and more strength. Street rods with modified engines will also benefit from a Holeshot converter. If your engine has a plate-type nitrous system, you need a Nitrous Holeshot. Furnace brazed impeller New precision steel alloy pump drive tube New heavy duty needle bearing between stator and impeller (not a thrust washer) Needle bearing between stator and turbine Furnace brazed turbine Dual pattern drive lugs on some GM Holeshots New turbine hub New springs and rollers in stator.