Greetings. New here... I own a '71 GMC Vandura with the Saginaw SM318 three-speed and a column shifter. On a different forum, someone told me that the column shifter could shift the four forward speeds, and a PTO cable or other arrangement could be made to operate the reverse fork. This struck me as a reasonable thing to attempt. I am interested in adding the four-speed because it spreads out the gears more. While I enjoy driving the three-on-the-tree, having only three forward gears is so few...
