I doubt the MT would fit under the bed. It might fit but will end up dangerously close to the panhard bar. The K02s are not problem.Are you suggesting the straps if he went the Mickey Thompson route or straps for 37's in general? I just put factory K02 37's on and need to swap out my spare from a 35 to a 37. I have seen people say you do need a strap and some say you don't.