Jack up the front of the car till front wheels are off the ground.. There's two bolts holding the fitting,,, that's on the top power steering box, where hose goes on, there 7/16.. just slightly loosen those bolts, and gently tap the fitting either backward, or forward, the wheels will tend to go one way or the other.. that will adjust your problem.. that's how to centre the "feedback".. you must have accidentally moved that fitting... grant
Nice looking car, by the way..