Something "CATCHING" Down the Steering Column

Usually the stud on the pitman arm hits the exhaust pipe on pre 73 cars from the engine sagging due to bad mounts.

Also Steering boxes have a high spot in the center of the sector shaft as mentioned so when going straight the car does not wonder. If the adjustment was tightened when the box shaft was not centered it will bind every time you steer past center because it was tightened on a low side.

It is important to check and see where the steering wheel is when it binds. That will help determine the cause. After you find that position put the steering wheel at that position and look to see if the pitman arm stud is directly under the exhaust pipe.

Look at the pipe for a rub mark. It will rub more in reverse or neutral then forward .Due to engine lifting when the torque of the engine lifts it on the left side off of the pipe going forward.

In 1973 they change this design and faced the stud down because of this bind.

Most headers designed today are for use with the 73 -76 style due to this issue. My Hooker 2 inch race headers hit so I moved a tube just to find out when I installed the later center link and arms it was not necessary.