Steering Coupler Removal

Hard to tell if that is a factory coupler due to the grinding, but if it is, there is in fact a pin that is typically there. It typically just does not allow for the coupler to completely be removed, but there is forward/reverse free movement/slop, do you have that movement? You would typically drive it in with a punch or nail until it frees the coupler wall thickness and drops out into the coupler cavity. Note the pin is located on one of the faces of the coupler which is the greatest dimensional size, or in other words the same direction as the roll pin.

You may be able to locate/see the pin if you just use a mirror to look into the coupler cavity. There will likely be a lot of grease/ dirt that would obscure things, so you may also try using a small screwdriver or wire to feel inside the coupler to locate the pin, as it does project into the coupler cavity. Know this is a pain, but if you want to go through the work of removing the column, you would be able to work things much more easily.

Here are a couple of pics that may help.