Legacy Metrics

1970 Plymouth Road Runner Superbird

RM23U0A175651roadUnited States
Engine
440 cu. in. OHV V8, single four-barrel carburetor, 375 bhp
Colour
Hemi Orange

The 1970 Plymouth Road Runner Superbird is a genuine, numbers-matching example of one of NASCAR homologation's most extreme productions, built to lure Richard Petty back to Plymouth and equipped with the 440 Super Commando V-8. Formerly part of the prominent John Staluppi collection in Florida, the car underwent a documented restoration that verified drivetrain originality and confirmed matching numbers throughout. Finished in Hemi Orange with a black vinyl interior, it retains its original nose cone, rear wing, and body sheet metal.

Ownership

  1. —Auction sale
    Sold US$110,000

    RM Sotheby's catalogue lot →

  2. Date unknownAcquisition unknown
    John Staluppi
    partial documentation

    Part of a noted Florida-based collection; the car was verified as numbers-matching during a restoration undertaken while in or after this ownership.

Competition

No competition history extracted from the catalogue.

Maintenance & restoration

  1. —
    Restoration

    A comprehensive restoration was carried out during which matching numbers were confirmed across the engine, transmission, core support, trunk rail, title, and original fender tag. Every mechanical component, including the steering box, was rebuilt; rear quarter panels and trunk floor were replaced, while all remaining body sheet metal was retained as original. Front seats were repaired and interior otherwise left intact.

    Drivetrain originality confirmed to include alternator, starter, and distributor. Nose cone and wing verified as original factory components, not reproductions.

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How this record is sourced

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.