I purchased and installed these on my excursion, what rear blocks would I need to level the truck? Do I add them onto the stock blocks that are there or would the new blocks replace the factory?
Assuming you have a 2" block out back already stock then you should need an additional 2 inches or one 4" block in the back with these springs. Measure from ground to top center of your fenders front and rear and see how much difference there is in height. That should tell you how much more block you need.