Tie Rod Ends

[sgr60]

I'm looking at replacing my tie rod ends. Plan is to get all four - the outer left and right, and also the two ends for the drag link - upper and lower. Looking at Moog parts on Summit, it looks like there are different parts based on gear ratio - I can't imagine why that would matter - it says that some are not compatible with 4.10 gears...

http://www.summitracing.com/search/y...2%2B4294947049

Does anyone know what the correct part numbers are for an '84 K20? Seems like a lot of choices for a pretty straightforward part...