Appropriately dubbed “Ruckus,” Texan Mike Maciejack’s 1987 Chevy R10 pickup is a Squarebody that causes a stir on the autocross circuit. It is a purpose-built competitor that weighs in at only 2,900 pounds and is powered by a naturally aspirated 434-cubic-inch engine based on Chevrolet Performance’s racing-inspired LSX cast iron engine block.

Power is rooted in a professionally built racing engine based on the Chevrolet Performance LSX cast iron cylinder block. It is filled with forged parts and valvetrain components designed for sustained high rpm. It’s also a naturally aspirated combination, with a single throttle body mounted on an aluminum carburetor-style intake manifold. On pump gas the engine reportedly makes about 700 horsepower

It’s all-business inside the R10’s cab, which has been stripped of all but the barest of necessities. They include competition instruments, switches and the controller for the engine’s EFI system, but the original dashboard, instrument panel and trim have been jettisoned to reduce the truck’s weight. A racing-spec roll cage surrounds the driver.

Behind the retro Squarebody front-end sheet metal is a No Limit Wide Ride independent front suspension, which features coilovers and tubular control arms. There’s also a rack-and-pinion steering system and huge Wilwood™ disc brakes.

Squarebody Chevy trucks are not common sights at the racetrack, but this LSXpowered pickup’s strong power-to-weight ratio and racing-inspired suspension details contribute to a very competitive combination. The rubber meets the track on 315-series tires mounted on 18-inch racing wheels.

At the rear is a NASCAR-inspired suspension system built from long trailing arms and incorporating coilovers. There’s also a Winter’s Performance quick-change rear end that uses a 4.12 gearset for most tracks. Power flows from the engine to the axle through a TREMEC® T56 Magnum sixspeed manual transmission.