to fit the 40’s with my MC 3.5 lift. First the Rubicon rock rails needed to be trimmed about 3 inches on both sides. This can be done very easily and will look great after it’s done. Next the rear wheel wheel I needed to trim in front and rear of the tire. About 2 inches on both sides. On the front side just trim the seem as much as you can up to the tub. There are threads on here on how to do it. Let me know if you have more questions. I did need to add more bump stop so the tires didn’t rub at full stuff as well.Can you share what you had to trim?