For years and years dual shocks were standard. Thats why i went with them in my build 2 summers ago. I have since learned that duals in the rear SUCK. Way to stiff, and i have doetsch dt3000 which are a really soft shock. In fact the rear is best with no shocks at all. I have removed the duals in the rear and it rides much better. I still run duals in the front but im always wondering what if i removed them.
For the front i wish i went with the F250 towers and a single expensive shock. Take into account that i paid like $400 for the front hoops i could have instead got some bilstiens shocks.
For the rear id install the dual mounts again but id space them way up to accomadate longer shocks. Maybe even put the shock more straight up and down to lessen the effect they have. The reason id still do the duals rear mounts is because i believe that if you go to rear disks you need to move the shock to the front of the axle for caliper clearence or something. Not sure but someone else may chime in and say the same. I also like the idea of one shock in front and one in rear of rear axle. Thats how i run mine now.
Duals are kinda 80's style. I got thrown under the bus when i asked the brothers how to remove the fluid from my rear dual shocks%) They look cool but i think a nice remote resevore shock would look much better under my rig now that ive been there done that.
I tell my girlfriend that in my next build im not gona do the duals....she says that shes not gona stick around for a "next" build

So do it once and do it right. Single bilstien remote res shock and F250 mounts up front and im not exactly sure what id do with the rear yet, but i wouldnt run duals back there either.
Some guys swear buy sway bars but every truck i have ever owned the first thing i throw away is them sway bars! I didnt see much body rool with mine lifted 6.5" and NO shocks so im not sure what these guys are used to driving. Corvetts and mustangs maybe???
Or just don't do 75 in an eb. That's just crazy.
I do 75 all day long on the freeway. Its not crazy. Whats more crazy is that i do it with manual steering, 4 wheel drum brakes, 6.5" of lift, 35" tires, and no top or rool cage!
Oh and if you do decide on duals up front put them both behind the axle. The dual shock you sometimes see mounted in front of the axle will get in the way of stuff.