The area of the column where it would connect to the dash column drop needed to be a little bigger than the original Corvair column. We welded the flange plate to the bottom of the column. It had 3 bolt holes. Where the column goes through the floor board needed some additional stiffening. The flange plate seemed like the best idea at the time. I don't think there is a dime's worth of difference between Ididit and Flaming River. Ididit went through the needed R&D long before Flaming River came around. I would guess that is the main difference.
You needed to be prepared to do some fabricating for the column drop at the bottom of the dash. You may find you don't need the bottom mount and that is good if you find you don't need it.
I do like the tilt feature in my car. I am lucky not to have the engine sitting right behind the seats. There is probably 12 inches between the back of my seats and the front of the radiator
I'll go back through my photobucket account and see if I have any pictures of the column and flange