I have an 88 f-250 with the twin I-beam front axle and my front wheels all of the sudden started leaning in on the tops drastically. I replaced the ball joints and even put on new front leaf springs and it is still the same. Someone told me that it was bent king pins but since i have ball joints i dont believe it had king pins. Im wondering if it is a simple alignment issue. I know i don need to replace the center bushing where the I-beams come together but i dont think that is the main issue. If any one knows an answer please let me know asap.
Thanks,
Chris

I need more info like tires and if there has been any type of other mods like lift kit and such.

the center bushings can cause the axle to shift, because essentially the pivot eye moves lower. Otherwise, springs also can do it. My 86 is starting to show some shift that way as well, and with a heavy load on, it really shows it. My dad's 84 is terrible about it, and I can about guarantee the center pivot bushings are shot on it.
You are correct, no king pins, just the ball joints.