Saw this over on Tech. Gotta love the little 5.3 puttin up the big numbers. 
My truck is a little out of the ordinary. But the engine seems right at home with this Forum
Motor is a 2006 Chevrolet 5.3 LS engine (Less than 30k when installed) with a S468 Bullseye Turbo Ls6 Camshaft, Texas Speed Pushrods and Valvesprings. Aeromotive Eliminator Fuel Pump, Aeromotive A-1000 Fuel Pressure Regulator, F.A.S.T. Fuel Rails, Cobalt 2.5 Bar Map Sensor, Custom Wiring Harness, Custom stock manifolds. E85 Fuel
Transmission is a Turbo 400 Built custom spec to the truck by Overtime Racing. Reverse Manual Valve body, Custom Spec Coan 4000 Stall converter all Backed by a completely rebuilt np-205 Transfer case, Brand new steel drive shaft with 1350 u-joints. Double Transmisson Cooler With Fan
Rear axle is a Corporate 14 Bolt with 3.73 gear Ratio with a Locker. Front Axle is Dana 44 with 3.73 but a open Carrier. OFF ROAD DESIGN Crossover Steering.
Wheels and tires are 22x14 KMC Diesels in Chrome mounted on 40x15.50x22 Nitto Mud Grapplers 90% tread or better.
Truck is Dyno tuned to run on E85 Ethanol Fuel. Has been tuned by TJ @ Baker Enginnering AKA hellbents10 550 RWHP 540 RWTQ to the 40" tires.
http://www.youtube.com/watch?v=zB0e1kTvERo
http://www.youtube.com/watch?v=tKluzz2Oh0Y
http://www.youtube.com/watch?v=aQR9wwYBMfM&feature=related
http://www.youtube.com/watch?v=nWrkNkPJNOw
my second thought after bad ass truck 
