Legacy Metrics

1958 Pontiac Bonneville convertible

K558H1951roadUnited States
Engine
370 cu. in. OHV V8 with Rochester fuel injection, 310 bhp
Colour
Rangoon Red with Graystone White

A 1958 Pontiac Bonneville convertible, one of an estimated 200 built that year with the optional Rochester fuel injection system producing 310 bhp from a 370 cu. in. V-8. Representing the top of Pontiac's newly expanded Bonneville series, this example features front and rear bucket seats, power accessories, and the removable Trans-Portable radio. It received a concours-quality restoration finished in Rangoon Red and Graystone White, and survives in notably fine condition.

Ownership

  1. Auction sale
  2. Date unknownAcquisition unknown
    Previous Tennessee-based owner
    partial documentation

    Car was based in Tennessee and received a concours-level restoration during or prior to this owner's tenure, including correct primered floor pans and matching factory color scheme.

  3. Date unknownPrivate sale
    Current owner, collector of 1950s convertibles
    partial documentation

    Acquired the car out of Tennessee; described as a well-regarded enthusiast specializing in 1950s open-top automobiles.

Competition

No competition history extracted from the catalogue.

Maintenance & restoration

  1. Restoration

    A comprehensive, concours-grade restoration was carried out, with attention to correctness throughout including primed floor pans; the Rangoon Red and Graystone White colour scheme was confirmed against the trim tag.

    Restoration completed prior to acquisition by the current owner; the car's overall finishes remain in excellent condition at time of cataloguing.

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This car's public record is built from its auction and competition history. Register your ownership and privately add your own records to make it a verified Legacy Metrics passport — provenance that backs your car's value at sale and gives your insurer evidence to price against. Roy reviews and verifies every registration personally.

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.