With the complexities of steering wheel control buttons, horn and the airbag circuitry, extending the steering wheel is no easy matter in the S197 chassis. If you ever have the steering wheel off of a modern car you will see just how many wires are passing through that "rotating connector", aka: the "
clock spring"
The 2011-14 Mustang uses a clock spring, # LRS-14664AC, $114 from
Letemodelrestoration.
These are delicate and if you disconnect the steering shaft in the engine bay and "spin the wheel" like you just don't care... you will ruin it. This is what connects all of those buttons on the steering wheel and the airbag itself to circuitry under the dash. It is "clocked" with the steering wheel, which should never rotate more than about 2 times. If you clock it wrong or spin the steering shaft too many times in one direction the clock spring will break and you will lose all steering wheel circuits and the airbag.
Installing a racing steering wheel and/or "quick connect" coupler makes it easy to add a spacer to get the wheel closer to you. Most aftermarket/racing steering wheels are flat and you add a quick connect and/or a spacer to get the wheel the proper distance from your body. Of course when you install a racing steering wheel you lose ALL of those circuits, but some kits can still keep the horn (street steering wheels).
For a car-to-pits "push to talk" button or other steering wheel mounted buttons in a race car you tend to wire them with pigtailed cords that are external and long. Those are still VERY easy to damage if you get them wrapped around the steering column too far. The LeMons car above had an external push to talk circuit that we broke in the first stint that day... no communication back to the pits during a long endurance race SUCKS.
Sorry to be pessimistic here, but you aren't going to find a simple solution to this "steering wheel spacer" for the ultra-tall folks. I'm only 6'3" and still have difficulty finding a proper seating/steering wheel position in most cars when wearing a helmet, especially cars with a sunroof (and I have gone to great lengths to even swapped the roof panel on a car to remove that). I have found it is easier to lower the seat (so you don't have to lean the seatback so far back to clear your head to the roof) with an aftermarket racing seat/bracket/slider to get the headroom I need, rather than move the stock steering wheel for proper placement with the stock seat laid waaaaay back.
Cheers,