Drag link question

The tapers should all be the same diameter. The direction of the taper changed because they flipped the ball joint direction for the pitman and idler between 68-72 and 73+.

I’m assuming that the power steering box you’re getting is the 73+ large sector version. I’m not aware of a large sector to 68-72 pitman arm, you’d need the 73+ center steering link to make that work.

With small sector boxes you can use either steering link because you can buy a 73+ manual pitman and use it on the earlier power box. But with the large sector power steering box I believe your only option is a ‘73+ pitman, which will need a ‘73+ center link.