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This Home-Built 1973 Chevrolet Camaro Will Knock You Out

HOT ROD logo HOT ROD 2015-10-23 Robert McGaffin, Ro McGonegal

1973 Chevy Camaro Side Front

1973 Chevy Camaro Side Front
© Provided by Hotrod

Jim Stehlin doesn’t work per se, rather he crafts. He derives his livelihood from building custom-made cabinetry. Wood is the naturally occurring medium and simultaneously reflects the past and the immediate present. It is comforting to the eye, soothing to the psyche. The key is that the material is intrinsically beautiful and that Jim’s expertise reveals the warmth in its luster and grain. He simply carried this deeply rooted emotion over to the mechanical, hands-on side and ganged it with a penchant for creating one-of-one components.

“I really like second-gen Camaros, and I built this one to drive and race,” he said during an interview from his home in Batavia, Illinois. “Most of the cars I could afford needed to be fixed up so I had to learn to fix them. I had some help from friends and family but I did most of the work myself.”

His cousin came across this unloved 1973 in Missouri, but before that it had marinated for a while in an Arkansas mud bog. Certainly, it was a physical and psychological rust pit. “It almost wasn’t worth rebuilding; however, there were so many new parts available that I was able to go ahead with it. I started the project 7 years ago. I built a rotisserie from scratch and put the Camaro on it. I replaced the floors front-to-back and put in new subframe rails, rocker panels, quarter-panels, and upper cowl. I also installed the roof from a 1979 T-top Camaro and custom-fitted the DSE suspension system.” Then the car went into hibernation for 5 years. Huh.

1973 Chevy Camaro Ls3 Engine © Provided by Hotrod 1973 Chevy Camaro Ls3 Engine

Concurrently, Jim was running his 1968 Camaro. When he wrecked it at the 2013 Holley LS Fest, he climbed back on the ’73 the next day. Over the winter, he finished the sheetmetal and mechanicals off, did everything except the interior and the paint treatment on the hood. We asked what was the most aggravating part of the project. “The most challenging would be the lack of tools to make the build easier.”

Jim channeled his aesthetic grace to a variety of areas: He built the one-off custom Arrow and the ground effects pieces, but said that Randy Johnson of D&Z Customs in West Bend, Wisconsin, is responsible for the front spoiler and air splitter. Now here’s something out of the ordinary: Jim assembled the Anvil carbon-fiber clip (yes, nose, fenders, and hood) and went to work on it, infusing the hood flat with a custom aluminum heat extractor.

On the inside of the F-body, Jim continued his performance. He custom-made the upper and lower dash, all the interior panels, and integrated an aluminum center console of his own device. Marquez Design furnished the fiberglass door panels that Jim dissected and revamped somewhat to accept the stereo speakers. Eventually, Riggs Brothers Auto Tops & Interiors upholstered all the panels to match the stuff hugging the Corbeau buckets and the bench perch.

Since the ’73 would be doubling as a competition car, Jim gained the rigidity that was relinquished by the T-top operation from a 10-point rollcage that he built from lengths of mild steel. Adjunct to it, he put up a DSE hydroformed subframe and custom-made subframe connectors. He anchored the front suspension with C6 Corvette spindles, directed by rack steering, and fronted them with RideTech triple-adjustable coilovers and a DSE antisway bar. He continued at the back of the car, installing a 9-inch in the familiar DSE QUADRALink cradle along with the RideTech coilover damping equipment.

This Home-Built 1973 Chevrolet Camaro Will Knock You Out

As for the running gear, we’re delighted that Jim continued with the do-it-yourself discipline. A six-speed manual transmission and a twin-disc clutch assembly are perfect for wrenching the most out of the Wegner Motorsports 416-cubic-inch LS3 – no overbore, just a hairy Callies Compstar crankshaft with a 4.00 inch stroke. Our chat with Casey Wegner was enlightening. He cautioned that all their engine dyno proofing is done with a Wegner accessory drive intact, so output is typically 25-30 hp less than what an unencumbered block might produce. (In the day, Detroit used to dyno its engines and rate horsepower and torque without the parasitic drag of accessories.) You’ll also notice that two critical valvetrain links, the rocker arms and roller lifters, are original equipment, mainly because the stuff behaves very well under stress.

1973 Chevy Camaro Front Wheel © Provided by Hotrod 1973 Chevy Camaro Front Wheel

Regardless of what else the Camaro might be saying to you, its most outstanding visual features are doubtless the red hash marks on the fenders and its mondo rim and tire combination. Tens and twelves are bitchin and who could argue with back wheels that are more than a foot deep? They are the drivers, the viable foils for the Sherwin-Williams Metallic Green. Jim did all the bodywork and applied the paint, but had someone else finish up with the clearcoats as well as the final wet-sanding. The final carbon-fiber 3M wrap was done by Greg at Sticker Dude in McHenry, Illinois.

“There are so many custom things done to this car that it is overwhelming to list them all,” said Jim. When he’s in line at an autocross exhibition we wonder if he’s thinking about that, all that waiting to come to life as he pushes the big red Start button and hears the pipes barking mellifluous but urgent. Then it’s lights out, Chief.

1973 Chevy Camaro Side © Provided by Hotrod 1973 Chevy Camaro Side
Tech Check
Owner:Jim Stehlin, Batavia, Illinois
Vehicle:1973 Chevrolet Camaro
Engine
Type:LS3
Displacement:416 ci
Compression Ratio:10.8:1
Bore: 4.06 inches
Stroke:4.00 inches
Cylinder Heads:LSA, CNC-ported, Manley 2.165/1.590 valves, 69cc combustion chambers
Rotating Assembly:Callies Compstar crankshaft and H-beam connecting rods, 10.8:1 Mahle pistons, Total Seal ring packs
Valvetrain:OE 1.7:1 rocker arms w/ COMP trunnion kit, Trend pushrods, PST springs, OE lifters, Wegner rocker covers
Camshaft:Bullet (specs proprietary)
Induction:FAST LSX intake manifold, 102mm throttle body, Spectre air cleaner, Rick’s Stainless Vaporworks fuel tank
Ignition:Phantom Works
Exhaust:Stainless Works headers with 1 7/8-inch primaries and 3-inch collectors, Stainless Works exhaust system kit and mufflers
Ancillaries: Wegner Motorsports accessory drive, C&R radiator
Output (at wheels):465 hp at 5,900 rpm, 435 lb-ft at 4,600 rpm
Machine WorkWegner Motorsports (Markesan, Wisconsin)
Built By:Wegner Motorsports
Drivetrain
Transmission: Tremec T-56 Magnum, Centerforce flywheel and twin-disc clutch assembly
Rear Axle: 9-inch, 3.73:1 gears, limited-slip differential
Chassis
Front Suspension: DSE hydroformed subframe, C6 spindles, RideTech triple-adjustable coilovers, DSE antisway bar
Rear Suspension: DSE QUADRALink, RideTech triple-adjustable coilovers, DSE antisway bar, custom subframe connectors
Brakes: Wilwood vented 13-inch rotors, six-piston calipers, front; Wilwood 12-inch rotors, one-piston calipers, rear; Wilwood master cylinder w/ manual booster
Wheels & Tires
Wheels: Forgeline DS3 18x10.5 front, 18x12.5 rear
Tires: BFG g-Force Rival 315/30 front, 335/30 rear
Interior
Upholstery: Riggs Brothers Auto Tops & Interiors (St. Charles, Illinois)
Material: Faux leather
Seats: Corbeau LG1, RideTech five-point harness
Steering:Rack-and-pinion, ididit column, Driven wheel
Shifter:Big Red
Dash:Custom-built by Jim Stehlin, insert: aluminum w/ vinyl covering
Instrumentation:Auto Meter
Audio:Alpine head unit w/ navigation, Hertz Mille 6-inch front speakers and Hi-Energy 10-inch subwoofer
HVAC: Vintage Air
Exterior
Bodywork:Jim Stehlin, including ground effects and arrow, T-top roof from 1979 Camaro, Marquez Designs taillights
Paint By:Jim Stehlin
Paint:Sherwin-Williams Metallic Green
Hood: Anvil carbon-fiber
Bumpers:Fiberglass front and rear

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