It's my understanding that the only thing different between the two kits is the one box that contains the strut spacers, blocks, and u-bolts. Rough country sends the same shocks with both kits. The fact that you can run the 5" or 7.5" with same aftermarket bilstein 5100's would also confirm that shock specs are the same for both lifts.
I'm doing the same thing. Just collecting parts for now and waiting until winter is over. I'm switching to chrome wheels when I drop the truck and don't want to run them until there is no more chance of snow/road salt.
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