which center/drag link am I looking for?

Professor Fate said
Oh, and the centerlink that you want to use with a downward-pointing stud in your idler and pitman is the '73-'76 unit.

and this unit is different in that its holes are not 90* (roughly) to each other like the one that came with my car, and that the taper points down of course. Is it by chance slightly longer? and is much straighter? AND, is the K member have to match the center link? I thought it was just idler/pitman/center matchymatchy.

Thanks Prof!

I have these laying around and i think the one without a pitman/idler on it is the one.... the holes where said idler/ pitman live, are slightly (1/2-3/4") further apart than my 67 center link.