Using Sac's link, your ratios will be:
1st 2nd 3rd 4th 5th 6th
High Range 4.46 2.61 1.72 1.25 1 0.84
Low Range 17.84 10.44 6.88 5 4 3.36
So, yes 6th gear low range is slightly higher than 1st gear high range. Your axle ratio would apply on top of this, but won't change where your gears overlap.
ETA: They do you a hell of a favor with that 4:1 transfer case IMO. On my toyota trail rig, I have dual 2.28:1 cases, so a max of ~5.2:1 with both in low. It would make a lot more sense to lower both high and low range by a factor of 2ish, since the thing never exceeds 25mph. I guess that is sort of accomplished by the second transfer case, but it seems like a waste of a set of high range gears.