My money is on the steering box. Its typically the last thing anyone wants to rebuild or replace. Remember, its over 40 years old.
Yeah I am leaning that way too.
The box is not original to the car and has never been rebuilt.
The only other thing it could be is the pitman and idler arms, they are not new either.
I am thinking of going one of two ways at this point.
Option 1 - I have a new fast ration pitman and idler arm that I could install and eliminate that as the issue.
Con 1 - with that, I just had the alignment done and would have to reset the toe, but should be able to do that at home.
Con 2 - I had the fast ratio arms on it before and the steering wheel is not centered with the arms on (no master spline and seems to be a tooth off. I could adjust the toe to center the wheel but will have uneven tie rods.
Option 2 - I have a second box that I could install. Again not rebuilt and no idea if its a leaker or not, bought it as a core. On the bench there seems to be very little play when you turn the input shaft. No in and out on the input, as there is on the one in the car.
Con - its a heck of a pain to switch out the boxes, especially for a maybe.
Pro for both options is little to no cost for either.
I guess its time to
Jason