I dont know if discussed already, couldnt find in search. If i put the 6400's on, do I need to do anything with the sway links?

 

come on, please help me

 

No, they're not related in any way.

 

I just figured if you lift the rear the liks would have to grow

 

You're links might need to lengthend...but i honestly don't know. The 6400 lifts the rear 1.5"(that's what i got out of 'em). So I assume there must be some movement up and down between the frame and suspension to compensate for suspension travel with the sway bar. That travel the bar has should be 'okay' for the 6400's installation and use. But...i honestly cannot give you any actual experience suggestions.