Baldwin-Motion
Phase III GT Corvette

Why it matters

The special-bodied Phase III GT Corvettes are among the most valuable Baldwin-Motion cars. Only about ten were built between 1969 and 1971, in addition to a prototype shown at the 1969 New York Auto Show.

How rare is it?

Six separate kinds of rarity – never combined into one number.

Each kind of rarity is rated separately and never combined.

Production

Every figure says what it counts.

Independent counts (e.g. engine and colour) are never combined into a calculated figure. Surviving examples are never presented as original production.

History

Corvette conversions came after the Camaro programme. The simpler Phase III SS-427 Corvette conversions began on some 1968 models and preceded the GT. In the 1969 SS-427 conversion described by Car Guy Chronicles, the 435 hp tri-power engine became a 500 hp Phase III unit with an aluminium manifold, an 850 cfm Holley carburettor, a Phase III cam kit and tuned headers, plus Super-Bite suspension and fender flares. Phase III cars carried Joel Rosen's quarter-mile guarantee.

Technical specifications

Engine

Transmission & drivetrain

Chassis, body & dimensions

Performance

“Not yet verified” means no source has been checked for that value yet. Nothing is estimated to fill a gap.

Sources

Each number links to the exact facts it supports.

1. 1
   Baldwin-Motion Level B Supercars.net

   • approximately ten GT Corvettes (in addition to the prototype)

   Accessed 2026-11-12
2. 2
   1968–1972 Baldwin-Motion Corvettes – CorvSport Level C

   • 10 approximate Phase III GT Corvettes built

   Accessed 2026-11-11