I have a question regarding tire size. I have an 06 3/4 ton Sub. The previous owner mounted 20" wheels. They are okay, but I prefer the look of a more meaty tire versus a low profile look. I really dig the look of the Ford Raptor set up. LT315/70R17. Beings this is a massive chuck of rubber, I am guessing they will not fit without major mods or if at all. However, what will fit??