There certainly is no "JK" more radical than Jason Scherer's 2009 King of the Hammers winning rig.
Chassis: Campbell Ent and Shaffer's Off-Road Pro-Mod KOH
Body: Carbon Fiber Jeep JK Hood and Grille, smoked tinted lexan side panels
Motor: Tweaked 2008 Corvette LS7 (635hp)
Transmission: Turbo 400
Transfer Case: Atlas 3.0
Front Axle: Spider 9 with True-Hi 9, spool and CTM shafts and U-Joints
Rear Axle: Spider 9 with Mega True-Hi 9, ARB with Spidertrax shafts
Rear Suspension: Shaffer's Off-Road designed with 2.5 Fox Coil-Overs and 3.0 Bypass shocks and Fox air bumps
Front Suspension: Campbell Enterprise Pan Hard with 2.5" Fox Coil-Overs and 2" Bumps
Steering: Howe full hydrulic
Wheels/Tires: OMF Bead-locked Alcoas and Custom Race Line wheels. 39" BF Goodrich KRT-B's and 42" BF Goodrich KM2's
Seats: Beard Seats custom made for my extra tall co-driver Jason Berger
Winch: Warn RC 9000
Extras: Cryo Dean's Kick Ass Off-Road Sway bar
Oil: Red Line
Overall Width: 79"
Weight: 3,600 lbs.
Good luck to Jason at the 2010 King of the Hammers! Let's hope a "JK" can make it two in a row!