[Beastmaster]

Any good 4x4 drivetrain shop would have the knowledge. Ask around in your area. Since you don't list a city or state in your profile, it's hard to recommend one.

However, you've got the issue of handling the high torque level. Jeep guys convert away from the standard NP242 to go with a Hummer based NP242 because it can take the abuse and handle higher torque. Going backwards means more breakage, hence the reason why either staying with the stock Hummer NP242 or going to a Transfer case that can handle the same level of abuse, like one from an Allison equipped truck.

Also - what are you trying to achieve? I fail to see why going to an electrically controlled transfer case would benefit you. The H1's already a capable off road machine, what are you trying to improve on?