how much trimming with a 40.5\" tire? I will have 7.5 inches on the suspension and 3 on body. The body on my truck is in great shape and I dont want to make any major cuts. Can I get away with just the rear of the front well or would I have to do more. I refuse to trim the rear. If its more than that I will go with something about 39". ALso most of my time is in mud so flex isn't that big but will happen crossing ditches and such.