I've recently purchased 2 1\2 drop spindles for a 66 C10. It has a disc brake front end on it, from what I'm not sure. That’s what brings me here. Are the original ball joins on a 66 C10 small than the ball joints on a 71 or later C10? When I went to install the RH spindle it slid right on the ball joints, then I found that the tie rod end was to big and wouldn't fit on the spindle. So does anyone have an answer to this problem?