This will give you 6" lift or more. Remember that the Axle is 3" in Diameter. That's 3" right there, then there's the height that the perch is off the axle. If the perch is an inch that means that swapping it to teh other side will add two inche sto the height.
Set the axle under the Leafs with the perch, jack the axle up until the springs are fully loaded, then determine the Pinion angle. You probably have to unload the springs , twist the axle to change the angle then load the springs again until you get the angle right, then weld. If you want to do it 'right', angle the pinion so if it was a gun, it would shoot a bullet and hit the trani spline... Then have a CV driveshaft built.
This '99 Blazer is my daughters.
It's the Newest car we own. I'm used to seeing Valve covers , not Wire looms everywhere.
Other vehicles in the stable:
1975 Jeep CJ5 Bought in 1980 Chevy powered fiberglass body I did the work
1985 Chevy Stepside Pickup// Original owner 298K miles
1989 Volvo 244 //Original owner 305K miles
1991 Ford Explorer Bought for $450 w/182K miles it now has 336K miles on it.