Chevy Power Steering Pulley - Billet Aluminum Keyed Fit. This is a 1 groove, V-Belt power Chevy power steering pump pulley. Fits keyed shaft for 350 small block chevy or big block chevy. Designed to be used with stock power steeering bracket. Shaft Diameter is 5/8" (.625) and pulley diameter is 5.8". Offset (distance from front of pulley to center of 1st V-groove) is 0.925"