1965-1969 Chevy Impala Power Steering Box Borgeson 800130This 1965 1969 Chevy Impala Power Steering Box is a Borgeson 800130. It fits multiple GM models and not just the Chevy Steering Box Specifications: Input Shaft: 3 4" 30 Spline Pitman Shaft: 1 1 4" GM with 32 Splines and 4 Master Splines Pressure Port: M18 X 1. 5 O Ring or 11 16" 18 Flare, if using included flare inserts Return Port: M16 X 1. 5 O Ring or 5 8" 18 Flare, if using included flare inserts Maximum Pressure: 1450 PSI Maximum Operating