Alex nice build, I'll have to dig up some pics of my 340 Dart Sport I bought new in 73 starting out of automotive co op at Try County Dodge here in Cincinnati OH and now going over a 72 Hemi Demon and dealing with same issues with column , Flaming River makes a slick narrow coupler for this, Thread - Starting a BB Duster project & The Dustbin Duster ,part 1 Hot Rod Network shows them drilling column to install FR Coupler . Mike