I have a lifted 2006 f150 fx4 screw. However I bought it this way and have no idea the actual height of the lift. I have an awesome opportunity for some 37x13.5 that came off a truck with a 6" lift. How can I make sure there going to fit? I know it's either a 4" or a 6" inch suspension lift. Any measurements I can make?
There's a subframe crossmember just about beneath the engine. It connects the lower control arms from right to left. Measure the distance from the location of the new lower control arms (center of the pivot point) to the center of the old location. That should give you a very close approximation of your lift.