I am sure you know that the factory high range is a straight through design where the input and output shafts are simply coupled in high range to achieve the 1:1 ratio. In order to achieve a higher high range ratio in an rf1a transfer box one of the housing sections would have to be completely re-cast. I suppose it could be done similarly to how the additional low range box is done, by simply adding an intermediate gear housing. Maybe you should start work on the prototype H8PVMNT?
Yeah I know about the strait through. It would have to be a completely new t-case. Maybe we already have this in the Atlas? Still this is priced out or reality for most of us. I've always been jealous of the Suzuki options. How cool would it be to have all your gearing needs met just from swapping a t-case?