Thats a nice set up! What RPM are you at when cruising on the highway- 70 mph- 23-2400?I too have a Bronco.
96 Eddie with a 351, with only 85k original miles
4.88 Nitro gears with Tru Tracs front and rear
35" Cooper ST MAXX
so far I've done a 4" lift using mixed components.
BDS extended radius arms.
Deaver superflex rear springs
Camburg shackles to drop rear about 1.5" because the Deavers had way too much lift.
Pro Comp front springs best riding of the off the shelf springs from what research I could gather.
Bilstein 5160 Shocks.
I used silicone sealant around the edges so hopefully they wont leak and get fogged up like most cheap lights do.
I got rid of the tube but I'm pretty sure it was GE All Purpose Silicone Sealant Caulk which says its 100% water and weather proof.