Oh NO! Please don't put the gears in one at a time.. If I did that I would pull the shifter out of the transfer case or the front driveshaft.. I'd make it where there was NO WAY to engage the front wheels!
With never going higher than 33's using a 3:73 should work fine for the best milage. If around home is hilly maybe the 4:11.. But I think the 4:56 is a bit low for that engine and only 33's.
The posi-loc is a good thing to have unless you drive over the top of a lot of heavy offroad brush and small trees.
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />

professional bovine relocation specialist