on a 69 Camaro hurst shifter where the shift rods attached to the shifter and shift levers with a cotter pin or a snap in clip
I am assuming you meant this.
On a 69 Camaro Hurst shifter, were the shift rods attached to the shifter and shift levers with a cotter pin or a snap in clip?
Short answer, cotter pin.
See this report.
http://www.camaros.org/shifters.shtml
And this image in that report.
http://www.camaros.org/images/shifter/69AIM_M20_3.jpg