i figured i would chime in with my 2 cents.....to answer some of your earlier questions...i cut my axle down about 8" from the right side of the diffy only. we used drop radius arm brackets from an 79 bronco and reinforced it. the stock radius arms from a bronco are actually longer than the superlift extended radius arms....they are so long, in fact, that we had to incorporate the RA brackets into the tranny crossmember.
as for flex, the superlift, skyjacker, trailmaster coils are ALL way to stiff for any serious amount of front end flex. the only ways to get a good amount of flex with these coils is to set them up for droop like rick did. his is setup so the coils can actually come out of the coil buckets and droop farther. you can also wrist the radius arms to move up and down when you are on the trail.
for what coils you use, you can go either way.....dale tiessen went with the duff progressive coils, and modified his explorer coil buckets to accept the full size spring. kampy and i both had a psudo adapter machined for us that allowed us to bolt the explorer coils to the bronco radius arms. oknut is the only person who went with leaf springs, but he also used full width axles, so that also attributes to the amount of flex he is getting.
another somthing to keep in mind is the engine crossmember. i am currently using the superlift 5.5" coils and i clear it, even at full compression. if you use any less, you will have to modify the crossmember so the pumpkin doesn't hit it.
any more questions, fire away