Shaun Hewitt’s ’70 Chevelle has show car looks and the heart of a brawler


Shaun’s the owner of Hewitt High Performance and one of the absolute go-to guys in the Bay area for LS engine builds, swaps, and complete car projects. This Chevelle is his calling card, and it is his way to throw a few haymakers like that bouncer in the corner. See, there’s really two Shauns, and you’re really looking at two Chevelles.

There’s Shaun one, who is the business owner, dedicated mechanic, and walking encyclopedia regarding the LS family of engines and how to wring stupid power out of them. There’s Chevelle one with the beautiful paint, 20-inch hoops, big brakes, and super clean interior. Then there’s Shaun two. That’s the guy known as SS Shaun on YouTube shown dominating late-night street races in the same Chevelle that you just mistook for a show car. Both this car and Shaun’s business have been part of a long-term success story, the kind of which we love to hear.

By The Numbers

1970 Chevy Chevelle
Shaun Hewitt • Hayward, California


Type: 370ci GM LS2-based V-8

Block: ’04 Chevrolet cast-iron

Bore x stroke: 4.03 x 3.60 inches

Rotating assembly: factory LS2 crank, Eagle 6.125-inch rods, and Wiseco forged pistons with steel top ring

Compression ratio: 10.0:1

Cylinder heads: stock GM LS2, casting No. 243, unmodified

Camshaft: COMP Cams solid roller, .609/.613-inch lift, 236/242 degrees duration at .050-inch lift, 114-degree LSA

Valvetrain: stock valves, COMP Cams 7.4-inch chrome-moly pushrods, Patriot Gold valvesprings, SLP double-roller timing chain

Induction: ProCharger D1SC feeding an Edelbrock Pro Flo XT intake manifold, K&N air cleaner

Exhaust: Edelbrock stepped 1 ¾- to 17/8-inch headers into a 3-inch X-pipe, 3-inch tubing to the back

Ignition: stock GM coil-on-plug

Cooling: three-core aluminum radiator with 4,000-cfm cooling fans

Other: Autocraft oil pan

Output: 689 hp at 6,500 rpm and 606 lb-ft of torque at 5,500 rpm (rear wheel)

Engine built by: Shaun Hewitt


Transmission: T56 six-speed manual with Monster Stage 3 hydraulic clutch, Pro 5.0 shifter

Rearend: GM 12-bolt with 3.73 gears and Detroit Truetrac differential


Frame: stock frame

Front suspension: tubular upper and lower control arms (unknown brand), QA1 adjustable coilover shocks, QA1 400-pound springs, Addco sway bar

Rear suspension: swap meet springs of unknown rate, Hellwig Pro Tour sway bar, QA1 12-way adjustable shocks, Pure Muscle adjustable upper and lower control arms

Steering: stock components with GM/Saginaw quick-ratio steering box

Brakes: C5 Corvette 13-inch discs (front), factory 2002 Camaro discs (rear)


Wheels: Niche, 20×8.5 (front), 20×10.5 (rear)

Tires: 245/40R20 BFG (front), 305/35R20 Mickey Thompson drag radial (rear)

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