alright heres the low down
some 4x2 rangers came with upper arms that can press out the balljoint, some didn't, also you can get an aftermarket arm that allows a removable balljoint.
Second, the Edge's have a larger upper balljoint, meaning the spindles have a largerr balljoint hole...
The edge spindle and xlt spindle are about the same length, its the t-bars vs coils that give more height, not the spindles themselves
Ok, so thats alittle background info
Now, You can run aftermarket edge spindles if you swap to edge upper controls (which you said you already had) However you really need 2 passenger side ones (the non adjustable ones). And then you use those with the edge lifting spindle and your set
You will also need new camber bushings because it will change your alignment. If you get the adjustable ones from Napa and install them, the alignment shop can align the truck with no extra charges (besides the alignment fee)
now, before anyone calls me a lier or doubts me, heres my proof:
and the guys cardomain
now the only down side i see to this is, you are now limiting yourself to ONLY a 3.5 spindle lift and nothing more suspension wise, unless you get custom control arms made($$$$).... The reason i say this is because the fabtech 2.5 coil lift that you can add to make it a 5.5-6inch suspension lift requires an aftermarket upper control arm that will NOT work with edge spindles
Anymore questions? Hell, buy the parts, drive to columbus, and i'll install it for you