ididit Retrofit Steering Column: 1965-66 Mustang - Manual (Page 7)

6.
At this point, a helper would make things much easier. With one hand in
the middle of the column and one at the top, slide the column between
the pedals and through the hole in the firewall.
Engage the coupler
onto the gear box. Set the column up into the original dash mount and
loosely install the original bolts into the original clamp. The tab on the
dash mount should be toward the firewall and engaged into the slot in
the bottom side of the tube on the steering column. Depending on its
condition, you may want to replace the rubber in the dash mount. (We
have found that a great substitute is the rubber from a bicycle inner tube
you may have laying around.)
Now, if everything is positioned well, you can go back and tighten
everything up. Start with the dash mount and tighten original two bolts to
108 – 156 inch lbs*. Next, tighten up the coupler set screw and locking
nut to manufacturer’s specs. Lastly, remove the tape holding the floor
mount to the column. Using the 3 sheet metal screws, secure the floor
mount and gasket to the firewall. Then tighten the floor mount clamp onto
the mount tabs and column to 50 inch lbs*.
*
(not foot pounds)
After removing all items from the
package, assemble the knobs onto the
levers. The tilt lever (shorter of the two
levers) goes on the left side of the column
in the hole closest to the dash. The column
has a threaded hole that this lever threads
into. (Figure 9)
The turn signal lever (longer of the two
levers) goes on the left side of the column
in the hole closest to the driver. The column
has a threaded hole that this lever threads
into. (Figure 10)
Knobs & Levers:
(Figure 9)
(Figure 10)