Good work Don.
In the Ford 71 manual, it is a bit annoying that they show the fixed columns for several vehicle models and merely state " tilt similar", If the coupler connection is so different, that area, at least, ought to be shown, but it's not. The best example I could see is for the Lincoln Continental, but the diagram is so small, it's hard to make out. This one appears to be a bolt on coupler for the fixed column, i.e. not attached to the welded on plate as on a mustang and again states "tilt similar". So I wonder if the coupler for a Lincoln Continental is the same needed for the Mustang with tilt? Hmmm!
EDIT: A search on RockAuto for the 71-73 Lincoln Continental only shows 1 coupler, a Lares 202 with 3/4" full round 36 spline and has two pins (or posts) that would engage in a plate similar to the Mustang fixed column. It does not show any other details. So I guess that idea was a bust, sorry.