The bend and stretch is complete, 3.75" of up travel, at full lock it hits nothing. Check out at full compression, the relationship between the bottom of the fender and tire.
Yes that is how you know you are doing it right, when the limit of your travel is the top of fender. In fact if I follow the Sutton philosophy, I may end up raising my ride height in order to get more travel. Remember the G-Force Cuda, where they used reverse Superbird style scoops over the tires ? They said a major reason for that styling exercise was for tire clearance.
Big American Bulges sure helped me out on this car. The bulges are so large that the tire turned all the way doesn't even get close to the skin of the fender, now the lip of the fender is a different story, it has a credit card thickness between it and the tire.
I had to limit my Mustang with bump stops, because I blistered the paint in the top of the fender.
Have to remember, these parts are just plugs. The molds will be made off the finished surface of the plug, then the part will pull out of the mold. Once the plug is mudded up, primed several times and painted it's surface will get much thicker, giving me a lot of leeway in where to thicken or thin out the critical rub areas. This 6" of travel is a bit of a ball buster though.