My main concern centers around the front suspension being pressed beyond its designed strength by adding extensions making the tubes longer (creating a change of rake and increased leverage), a much larger front tire, and the effect that its larger diameter and weight's effect on the forks.
I'm not an engineer, so am only scratching my head about the effects and increased stress put on the forks that may not be beefy enough. More weight, higher braking drag, different rake, and longer leaverage, making the forks more susceptible to bending when being ridden off road more vigorously, just makes me wonder if larger diameter forks will also end up on the list of 'must change' items.
Anyway, I'm rooting for you guys trying. Just my 2-cents.