My car has a rather odd affliction with the steering. The car is a glass ’27 T on a homemade chassis with a ’54 Chrysler engine. The front axle, steering and brakes are all Speedway. The camber came with the axle, the caster is 6 degrees, and the toe-in is 1/8”. The rear axle is a 9” Ford with coil overs and homemade radius rods. The wheel base is 108” Almost every time I take it out the straight ahead position of the steering wheel changes. I know this because I drive a 3 mile section of straight road and frequently notice the position of the steering wheel changes from 12 o’clock to somewhere around 1:30. This does not change while I’m driving on the highway, but has sometimes changed after parking or negotiating low speed sharper turns like in a subdivision. The steering is not sloppy and the car does not wander while driving. I have checked numerous times and find nothing loose or sloppy. The steering wheel is tight on a splined shaft. The “U” joint on the shaft is tight. The steering gear has very little play. The pitman arm is tight to the steering gear output shaft. The drag link Heim joints are tight with no play at either end. The drag link connection to the left front spindle hub is tight. The tie rod Heim joints are both tight with no play at either end, and both left and right steering arm are tight to the wheel hubs. The front axle spring shackles and center mount are tight. Both front radius rods are tight with no play at either end, and the Heim joints on both ends of the front panhard bar are tight with no play. The rear axle radius rods are tight with no play at either end and the rear panhard bar is tight with no play at either end. Has anyone experienced anything like this or maybe some ideas.