But again, that won't fix truly worn suspension pieces.
But will aid in the steering "feel".
There's nothing wrong with the 68 Idler/Centerlink/Pitman combo. BUT if you are replacing your steering box (and especially if you have an old idler & pitman too), I would convert to a large sector box and the 73-73 Idler/Centerlink/Pitman combo because replacement idler and pitman are easier and cheaper to find.
I think the Borgansen conversion box is better money spent than a rebuilt steering box with old gears in it. And you would save the extra money of the long pitman and idler vs stock stuff prices.