I sincerely hope that M-II setup isn't one of the ones that puts the front bumper a couple of inches off the ground. Besides making the truck look like a hound dog that's just had a close encounter with a skunk, it won't really matter what kind of rear axle you install. The truck will be a hazard to navigation at any speed above parking lot cruising.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!