Hey found this for you while browsing the site just now...posted by another member. It might help, although I can't verify if it's good info or not. Thanks to BlizzardX23.
Quote:
Well...It would be a test situation as I have never made longer links...I made my shorter links and they work perfect though so I can use the same math and make longer links...or you guys can do it if you want...I just already have the right size metal rods.
The stock links are 4 inches long. For every in lowered, you much cut 1/4 inch off the link. For ever inch lifted, you must ADD 1/4 inch to the link
So if you add a 3 inch lift to your truck, your stock 4 inch links must be 4 3/4 inch long...since you need to add 3/4 inch after lifting truck