The most powerful Phase III Corvette built in 1969 – MOTION 482-INCH VETTE: THE BEAST FROM BALDWIN was close, but not a true Baldwin-Motion car.  It was a 600-horsepower Vette built on a brand-new Stingray from Reedman Chevrolet, supplied by purchaser David McCaughey, a returning Vietnam vet.


 After serving a couple of tours in Vietnam in 1968, McCaughey returned home to Southampton, PA and gave serious thought to buying the car he had been dreaming about for the past year – a super-performance big-block Corvette.  He had read about Phase III Corvettes in auto magazines and Baldwin-Motion catalogs while in Vietnam and wanted a Joel Rosen-built, Motion-powered Phase III Corvette.  Had he not found a great deal on a new one in stock at nearby Reedman Chevrolet in Langhorne, he would have ordered the Corvette from Baldwin Chevrolet.  On March 14, 1969 McCaughey took delivery of a Fathom Green coupe powered by the venerable tri-power 427/435.  After getting a temporary tag at Reedman, he drove just over 100 miles to Motion Performance to meet Joel Rosen!

McCaughey set the performance parameters for his new ride:  10-second track times, comfortable 120-mph cruise speeds and 160 mph top end.  Rosen came up with the formula for creating his  most powerful street Corvette ever, and turned McCaughey’s vision into reality.  To deliver this level of performance, Rosen recommended a special-order, bored and stroked 482-inch ZL/X Elephant motor.  McCaughey signed on the dotted line!

The original engine was replaced with a blueprinted and balanced 600-horsepower big-block.  Displacing 482 cubic inches, it featured open-chamber ZL/Xiron heads, forged steel ¼-inch stroker crank, forged 12.5-to-l pistons, Holley 850-cfm four-barrel, Edelbrock TM2R intake, .600-inch lift cam, solid lifters, Accel dual-point, tach-drive distributor, Mallory electronic shutoff, Super Pumper electric fuel pump, L88 Corvette alternator, deep-grooved pulleys, tuned headers and chromed outside exhausts.

A lot of work went into the drivetrain and chassis as part of the Phase III conversion.  The four-speed was fitted with a Hurst shifter and a SEMA-approved clutch/flywheel assembly and scattershield were added.  Factory 4.11 Posi gears were removed and the rear fitted with a special 5.13 assembly.  Chassis modifications included Super-Bite suspension with traction bar and Koni and Cure-Ride shocks.

MOTION 482-INCH VETTE: THE BEAST FROM BALDWINTwo Motion Corvettes, a 600-horsepower Phase III Corvette and a Manta Ray, line up for a run at the 2004 Supercar Reunion. (Photo: Jeff Murphy)

Not in a position to buy a second car, McCaughey wanted the best of both worlds – the ability to race his 600-horsepower Corvette and drive it daily.  Rosen was able to pull it all together by installing a Hone overdrive auxiliary transmission.  When engaged, the Hone OD effectively reduced the 5.13 final drive ratio by 30 percent to 3.60-to-l.  This allowed McCaughey to comfortably cruise around 120 mph and see 160 mph on the Interstate.“I drove it on the streets in Southampton.  The fastest I remember driving was 160 mph, pegging the speedometer,” wrote McCaughey in a letter dated June 2, 2003.

In 1973 McCaughey blew the Corvette’s clutch and had it towed to his garage.  And that’s where it stayed, blown clutch and all, until being sold 21 years later to Anthony Marchino. When Marchino titled the Corvette on August 17, 1994, the odometer showed 14,800 miles.  Mark Rusden of Huntingdon Valley, PA, purchased it in December 2002 and the title transfer shows 14,893 miles.  When the Phase III Corvette was photographed at the Supercar Reunion its odometer showed 14,927 miles.  “I put most of those 34 miles on a quarter-a-mile at a time,” said Rusden!

What makes this Phase III Corvette truly unique is that its 482-inch Motion engine and drive train were built for racing – yet they have survived.  The body and interior have never been restored!  The gas tank sticker is still in place and original emission stickers and crayon markings are still on the firewall. Rear body mounts and bushings still have traces of original assembly masking tape.  In addition to being documented by Joel Rosen as a genuine Motion Phase III Corvette, there is a complete paper trail dating back to pre-delivery paperwork from Reedman.

In August 2005, the Motion Phase III Corvette changed hands yet again. It crossed the block at the RM Monterey Sports & Classic Auction, bringing $198,000.  It became part of John O’Quinn’s huge collection in Houston, TX where it was surrounded by hundreds of rare classics and exotics. Since then, it changed hands a number of times and is once again up for auction on Bring A Trailer.

Motion and Baldwin-Motion Corvettes are featured in MOTION PERFORMANCE, Tales Of A Muscle Car Builder, available @

Check out Hagerty’s Brandan Gillogly story on the MOTION 482-INCH VETTE: THE BEAST FROM BALDWIN @

Follow MOTION 482-INCH VETTE: THE BEAST FROM BALDWIN (Motion Phase III Corvette) auction @



Recommended reading from Keith Cornett, CorvetteBlogger and founder of VetteFinders. Not only a ‘pretty face’, CORVETTE SPECIAL EDITIONS is an invaluable resource for information about iconic and collectible performance models.

SPECIAL EDITIONS: CORVETTES THAT MATTER!SPECIAL EDITIONS: CORVETTES THAT MATTER!At first glance, Keith Cornett’s new book is a little misleading. The title does not reveal the wealth of photography and information that goes well beyond Special Editions. To many, Special Editions often refers to Indy Pace Car replicas, commemorative models celebrating racing victories, anniversaries, performance achievements, regional editions, or a particular individual who has devoted a great deal of his life to elevating the status of the Corvette. It is all that, but so much more.

CORVETTE SPECIAL EDITIONS is way beyond the 43 official Chevrolet limited production, special edition Corvettes starting with the 1978 Silver Anniversary and Indy 500 Pace Car replica and ending with the 2018 Carbon 65 I found the most interesting sections of this book are devoted to the history of the Corvette and iconic road and track performance models that are coveted by serious collectors.

SPECIAL EDITIONS: CORVETTES THAT MATTER!SPECIAL EDITIONS: CORVETTES THAT MATTER!Even the first Corvette in 1953 must be considered a “special edition” since only 300 were built! Coverage of low-volume, track-oriented Corvettes started when Zora Arkus-Duntov convinced the powers at Chevrolet of the value of being involved in sports car racing. Nothing showcases Duntov’s position more than the first fuel-injected, four-speed, 283/283 ’57 Corvette with RPO 579D “Airbox” option. Just 43 were built and they led the charge to the Corvette earning America’s Sports Car cred! Great coverage on a black Airbox car, above, with coke-bottle hubcaps tells the unique option’s story.

SPECIAL EDITIONS: CORVETTES THAT MATTER!SPECIAL EDITIONS: CORVETTES THAT MATTER!After Keith runs out of actual factory production Special Editions, like the Grand Sport, Z06 Sting Ray, 1967-1969 aluminum-head big-block L88s, above, the yellow all-aluminum big-block ZL1, above, and Zora’s hardcore ZR1small-block and ZR2 big-block Stingrays, he focuses on low-volume, very-special-edition “tuner” Corvettes that go one step beyond what the factory could do. Corvette-based, tuner cars and their builders make up one of the most interesting chapters, Chapter 6, DEALERS, TUNERS, AND THIRD-PARTY SPECIAL EDITIONS.

SPECIAL EDITIONS: CORVETTES THAT MATTER!SPECIAL EDITIONS: CORVETTES THAT MATTER!Many, like the Baldwin-Motion Phase III, Maco Shark, Manta Ray, Can-Am Spyder and the ultimate Phase III GT Corvette, above & right, were created by Joel Rosen between 1968 and 1974, were built to order. Horsepower started around 500 and, like Alice’s Restaurant, “you could get anything you want!”

In addition to Joel Rosen’s Baldwin-Motion, there’s coverage on John and Burt Greenwood’s extensive lineup, Reeves Callaway who is still producing tuner Corvettes, Lingenfelter Performance Engineering, American Custom Industries’ Duntov Turbo, Dick Guldstrand GS80/GS90, Avelate Corvette, Larry Shinoda/Rick Mears Special Edition, Pratt & Miller C6RS and others. This chapter is a treasure trove of seriously high-performance, some over-the-top, fantasy rides.


Well-written and beautifully illustrated, CORVETTE SPECIAL EDITIONS presents the cars as a group instead of chronologically. It’s organized into six categories: Anniversary Editions, Indy 500 Pace Cars, Commemoratives and Tributes, Special Editions, Historic Corvettes, and Third-Party Special Editions. This 192-page coffee table book is available at

If you are interested in a signed copy, please visit

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