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1989 Chevy K3500 Pickup - 2007 Top Truck Challenge Competitor

Like A (Granite) Rock
By Ken Brubaker
Photography by Sean P. Holman, Ken Brubaker
1989 Chevy K3500 Drivers Side View
Camo'd up and ready for combat,... 
   
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1989 Chevy K3500 Drivers Side View
Camo'd up and ready for combat, Rick's Chevy looks ready to conquer our Mud Pit. Up front, the Winch Ready Triton 2 bumper houses a Warn 15000, and KC and Westin lights provide illumination. Base paint was applied by Rick, with assistance from Jennifer, Laura, and Joe, and with metal accents courtesy of a Case backhoe.
1989 Chevy K3500 Rear Axle
Mirroring the front, the rear... 
   
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1989 Chevy K3500 Rear Axle
Mirroring the front, the rear Rockwell 2 1/2-ton also turns 6.72:1 ring-and-pinions, with welded spiders serving in lieu of a locker. The three-link/coil-spring suspension is damped by a single nitro shock in a custom hoop at each end, and together with the owner-fabbed 3-inch body lift, it clears the 46x19.5 Mickey Thompson BCs on 16.5-inch Marsh Racing steelies.
1989 Chevy K3500 Interior
As with most mud trucks (i.e.,... 
   
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1989 Chevy K3500 Interior
As with most mud trucks (i.e., that get reeeally dirty inside), Rick's kept interior mods to a minimum. Auto Meter gauges monitor rev and amps, engine temp and oil pressure, and a trick 12voltguy.com control panel allows Rick to juggle electrical functions with a flip of a switch.
1989 Chevy K3500 Engine
Big boggers need big power,... 
   
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1989 Chevy K3500 Engine
Big boggers need big power, and Rick's Chevy 454 big-block, bored 0.030 over and running 13.0:1 compression, is built to deliver. The balanced block is stuffed with SRP forged pistons and a solid .632-inch-lift roller cam. A Team G intake manifold works with the Holley carb to feed fuel through the runners, and 1 7/8-inch Hedman headers funnel exhaust gases to 3-inch Flowmasters-and in case that's not enough grunt, a 150hp NOS nitrous system is plumbed into the intake. Dual Optima Yellow-Tops provide the juice, and a Mallory Hi Fire ignition and coil, MSD distributor and wires, and an owner-fabbed wiring harness work to regulate and flow the volts. On the bottle, Rick estimates his big-block is good for 675 hp and 690 lb-ft of torque.
1989 Chevy K3500 Front Axle
Up front, the divorce-mounted... 
   
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1989 Chevy K3500 Front Axle
Up front, the divorce-mounted NP205 transfer case spins a Houston Driveline driveshaft to turn the cogs in the 2 1/2-ton Rockwell axle. The frontend has been converted to full hydraulic steering with a custom drag link courtesy of Texas Auto Gear, and welded 6.72:1 gears inside the diff provide locking by Lincoln. The suspension is relatively basic (by TTC standards), a triangulated three-link/coil-spring arrangement running a single nitro-charged shock at each corner, and a custom 3-inch body provides added clearance in the wells. Sixteen-and-a-half inch steel Marsh racing rims and 46-inch Mickey Thompson 'Claws comprise rolling stock, and the standard-issue Rockwell pinion brake helps to slow down the big Chevy. We dig the custom tow hook welded onto the axlehousing too.

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