Legacy Metrics

1970 Chevrolet Chevelle SS 454 LS6 Convertible

136670B161703roadUnited States
Engine
7.4L (454 cu. in.) OHV V-8 with Holley four-barrel carburetor, 450 bhp at 5,600 rpm, 500 lb-ft torque
Colour
Medium Turquoise Metallic with white convertible top

A 1970 Chevrolet Chevelle SS 454 convertible equipped with the rare LS6 Turbo-Jet 454 V-8, one of the most powerful factory muscle car options of its era, rated at 450 bhp. Production of LS6 convertibles is estimated at fewer than 200 units, making this example among the rarest Chevelles built. The car was comprehensively restored by noted collector Carl Dwiggins, then passed to Milton Robson's celebrated muscle car collection before entering its current ownership in 2010.

Ownership

  1. Auction sale
  2. → 1991-03-01Acquisition unknown
    Carl Dwiggins
    partial documentation

    Prominent muscle car collector who carried out a thorough ground-up restoration, during which the original broadcast sheet was recovered confirming factory LS6 specification.

  3. 1991-03-01 →Private sale
    Milton Robson
    partial documentation

    Renowned collector noted for acquiring only top-tier muscle cars; purchased the vehicle from Dwiggins in March 1991 and it became part of his celebrated collection.

  4. 2010-11-01 →Acquisition unknown
    Current vendor
    partial documentation

    Has kept the car in careful storage and driven it only occasionally; has not entered it in any concours or show events since taking ownership.

Competition

No competition history extracted from the catalogue.

Maintenance & restoration

  1. Restoration

    A complete ground-up restoration was carried out by Carl Dwiggins, during which the original build documentation sheet was located inside the car.

    The broadcast sheet, though not in pristine condition, confirmed the LS6 engine as original factory equipment.

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Each chassis record is compiled from public auction archives and links to its source material. Ownership, competition and maintenance entries are extracted from those catalogue listings by an LLM, which can make mistakes — please contact us with any corrections. The summary is Legacy Metrics’ own writing; we do not reproduce catalogue text.

“Full” and “partial” documentation labels indicate how well each entry is corroborated in the underlying sources, not an audit of the car’s physical paperwork. Names of recent or living owners are withheld for privacy.