You would have to rotate a lot more than the spring perches. It's the link bracketry that determines the pinion angle. You're still in leaf spring mode.
I could cut the upper link brackets while I'm in there and rotate the housing if needed. DIY adjustable links are $230, adjustable upper links are $375, so neither of those are happening.
This calculator site has lots already built into its formulas. Just use the 1st drop down box to select your transmission. Let's you do two drive trains side by side for comparo. http://www.grimmjeeper.com/gears.html
if you were going to run the FJ60 split case....what would be the downside to something like this, which I understand can be an dapater and a hi-low box too. BlackBox-c Land Cruiser Edition
And as far as gearing goes, if you want lower diff gears for the street (lower high range essentially), and you want a lower low range but 4:1 is too low, Marks makes a set of gears with .88 hi-range and 2.81 low-range. And they make a set with .88 hi-range and 3.1 low-range. I would think this is the best way to kill two birds with one gear (two gears actually).
ok so it has a different booster and mc...that was throwing me off and I was not tracking on teh semi-float 80 axle....the mud is getting clearer now..