No Sin LSX Power

Mike Maciejack isn’t the type to build trucks just for show. That’s why during May’s C10 Nationals at Texas Motor Speedway he was competing in the autocross portion of the event in his black 1987 Chevrolet R10.
 
The truck known as “Ruckus” features a 434 cu.-in. engine built on a Chevrolet Performance LSX block.

“I’ve always been a Chevy guy, I own 10 Chevy trucks,” said Maciejack, who lives in Oak Point, Texas. “And I always wanted the LSX block … I couldn’t find them a few years ago because they weren’t available from [all the] demand. When they came up I bought one.”
 
Maciejack, who owns No Sin Customs, bought the truck for $500 as a parts vehicle. It originally had a long bed, which he transplanted into his son’s truck. After some time the R10 became a shop truck, but then a friend at Munssey Speed suggested making it into a carbon wide-body. They painstakingly molded it into shape, creating a unique and very quick piece.
 
“We figured out it was pretty competitive so we dropped a big old motor in it and started bringing it to the events,” Maciejack said.

Thompson Motorsports built the naturally aspirated engine that makes plenty of low-end torque. The power plant is stroked and bored, helping it make a little over 700 horsepower on pump gasoline. Maciejack estimates it cranks out over 900 horses on race fuel.
 
“It’s snappy,” he said.
 
The setup also includes a Nitrous Express kit, but Maciejack really only uses it when he is running race gas.
 
At the C10 Nationals the engine was mated to a Turbo 400 transmission, but the current transmission is a Tick Performance road-race T56 Magnum six-speed.
 
The R10 also sports a Winter’s Performance quick-change rear end utilizing a 4.12 gear, along with a No Limit Wide Ride independent front suspension and custom rear suspension built from trailing arms, similar to a NASCAR setup.
 
The truck rides on 18-inch LT3 Minilite-based wheels paired with sticky 315mm Falken Azenis RT660 tires.

The truck is still on its original frame but now has a full roll-cage setup. The back of the frame has also been cut off and rebuilt, but otherwise, it’s how it came from General Motors. The interior is bare-bones, highlighted by racing equipment, gauges and electronic components designed to help Maciejack go fast on the racetrack.
 
Thanks to its carbon body, even with its racing components the R10 checks in at an extremely light weight.
 
“It’s actually the lightest race C10 on the planet, it weighs in at around 2900 pounds,” Maciejack said. “Whereas most of these other trucks are 3300 to 3500 pounds.”
 
In addition to the C10 Nationals, Maciejack competes in events like the Grand Champion program at Holley LS Fest and plans to determine the truck’s top speed in a mile at the famed Texas Mile in October. A talented driver, in 2022, he took fourth in autocross at the Texas C10 Nationals with a Small-Block making 350 horsepower.

Though he was originally a metal fabricator, his No Sin Customs shop also offers a variety of carbon-fiber panels like the ones on “Ruckus.” His friends at Munssey Speed taught him how to do carbon-fiber work.
 
Maciejack hails from Fort Lewis, Washington, and grew up a military brat but has lived in Texas since 1989. A lifelong automotive enthusiast, his first truck was a GM square-body that his son now drives. He comes from drag racing and raced Camaros and C10s for 25 years before getting involved with autocross last year. However, he still is part of the drag racing community and also owns a 2,000-horsepower drag truck called “Archangel.”
 
Maciejack was right at home surrounded by like-minded racers at the C10 Nationals, many of whom he considers friends. At the event a buddy’s blue-and-white Blazer was the only other vehicle technically part of his team. However, the No Sin Customs group is ever growing with like-minded individuals.
 
“I don’t build a lot of show vehicles that sit there,” Maciejack said. “We do race cars.”
 
Keep watching The BLOCK for more Chevrolet Performance builds from the Texas C10 Nationals and events across the nation.