My build thread shows what I did. column shift with 350TH. I used a B&M cable and lower brackets and fabbed one for the firewall. Make sure the level pivot dim is the same on the trans and column. Before I had a floor shifter but it got old having the kids in the middle of the seat kicking it out of gear and fighting their feet.
here is link to mine
http://67-72chevytrucks.com/vboard/s...&postcount=134