Power Steering Conversion Box1962-66 Chevy II Nova11/16"-36 Spline Input Shaft14:1 Ratio Input Shaft: 11/16"-36 SplinePitman Shaft: 1-1/8" GM with 32 Splines and 4 Master SplinesPressure Port: 16mm X 1.5 Flare (Located closest to the engine)Return Port: 16mm X 1.5 Flare (Located closest to input shaft)Maximum Pressure: 1450 PSI Maximum Operating Pressure, 1100-1250 OptimalFlow Rate: 2.0-2.5 GPM Flow Rate RecommendedPower conversion box is intended for use with stock columnFloor Shift Applications OnlyBorgeson column shaft #990041 is recommended for installation.