I am not sure why you would want to? Unless you just want an aftermarket shifter Why not just post in the want section for a good used 68 one? There are plenty of used 2 speed auto shifters out there from all the 4 speed conversions done over the years. Then if you are using the 3sp turbo 350 just install the 2 speed to 3 speed conversion kit that company's like Ames performance engineering sells.