http://67-72chevytrucks.com/vboard/s...d.php?t=764270
Why not try the PVC pipe column trick I described in post #9 of this thread so you can see what suits you. Like shoes, different people need different sizes and an ididit is a big investment into your comfort and safety. You want to get it right the first time. Edit: you also need to be clear on how idid it measures their columns. Remember they have the splined stub that extends past the tube and I think it may count in the overall dimensions