Wehrs Machine Shifter Knob - 5-1/2" - Black Cooling & Heating Because there are fairly wide

Because there are fairly wide tolerances in factory bolt holes

1964-1965 GMC B3500

Rocker Arm Channel

1964-1979 Chevrolet El Camino

Wehrs Machine Shifter Knob - 5-1/2" - Black Cooling & Heating Because there are fairly wideProduct Description: Shifter Stick 5. 5 in Length 3 8 16 in Thread Straight Knob Included Aluminum Black Anodized Sold Individually Wehrs produces custom machined chassis and engine components designed for racing use. Their lineup includes everything from mounting brackets to cover panels, birdcage assemblies, and much more. Many of their parts are made from lightweight aluminum. They also offer a number of specialty tools. Wehrs Machine & Racing