I had a C&R in my CJ and it worked incredible. I had it custom built to fit between the headlight openings and even had a trans cooler built into it. It was very expensive but it worked flawlessly. Our moon buggy runs a griffin and it works very well too. As for the mm I would fab some up since there aren't really any available that I have seen.
Matt Holm
Outer Limit Motorsports
Matt Holm
Outer Limit Motorsports